Opinion for the court filed by Circuit. Judge BUCKLEY.
Dissenting opinion filed by Circuit Judge STEPHEN F. WILLIAMS.
BUCKLEY, Circuit Judge:The 1982 antitrust consent decree providing for divestiture of the American Telephone and Telegraph Company (“AT&T”) prohibits its former local exchange subsidiaries, the Bell Operating Companies (“BOCs”), from engaging in certain lines of business, including the manufacture of telecommunications products, either “directly or 'through any affiliated enterprise.” The question presented is whether a contractual relationship under which American Information Technologies Corporation (“Ameritech”) would provide funds to an independent company for product development in exchange for royalties on sales of the product to third parties may render the independent company an “affiliated enterprise.” The district court answered this question in the affirmative by denying the Department of Justice’s (“DOJ”) motion for a declaratory judgment that the term “affiliated enterprise” covers only those concerns in which a BOC has either more than a de minimis equity interest or operational control. The court also denied Ameri-tech’s request for a waiver from the consent decree’s line-of-business restrictions to permit it to enter such funding/royalty arrangements.
We hold that the term “affiliated enterprise” was intended to cover all arrangements in which the BOCs share directly- in the revenues of entities engaged in prohibited businesses, and hence that the district court acted properly by denying the DOJ’s motion for a declaratory judgment. We remand, however, to permit a fuller exploration of the question whether Ameritech is entitled to a waiver.
I. BACKGROUND
The AT&T consent decree (“Decree”) imposes restrictions on-the product and service markets that the BOCs may enter. The restrictions were intended to ensure that the BOCs would not use their monopoly control over local telephone exchanges to impede competition in other markets. See United States v. American Tel. & Tel. Co., 552 F.Supp. 131, 186-94 (D.D.C.1982) (“Decree Opinion ”), aff'd sub nom. Maryland v. United States, 460 U.S. 1001, 103 S.Ct. 1240, 75 L.Ed.2d 472 (1983). Section 11(D) of the Decree provides:
After completion of the reorganization ... no BOC shall, directly or through any affiliated enterprise:
1. provide interexchange telecommunications services or information .services;
2. manufacture or provide telecommunications products or customer premises equipment (except for provision of customer premises equipment for emergency services); or
3. provide any other product or service, except exchange telecommunications and exchange access service, that is not a natural monopoly service actually regulated by tariff. .
Id. at 227-28 (emphasis added). The district court has subsequently modified the decree by eliminating the prohibitions on non-telecommunications businesses, United States v. Western Elec. Co., 673 F.Supp. 525, 597-99 (D.D.C.1987), and on providing information services. United States v. Western Elec. Co., 767 F.Supp. 308, 332 (D.D.C.1991), aff'd, 993 F.2d 1572 (D.C.Cir.1993). The manufacturing and interexchange restrictions, however, remain in force. See generally United States v. Western Elec. Co., 900 F.2d 283, 300-05 (D.C.Cir.1990) (“Triennial Review”) (declining to lift these restrictions).
The Decree does make it possible for a BOC to obtain a “waiver” of the line-of-business restrictions under certain conditions. Specifically, under section VIII(C),
[t]he restrictions imposed upon the separated BOCs by virtue of section 11(D) shall be removed upon a showing by the petitioning BOC that there is no substantial possibility that it could use its monopoly power to impede competition in the market it seeks to enter.
*228Decree Opinion, 552 F.Supp. at 231. Under procedures established by the district court, a BOC seeking a section VIII(C) waiver must first submit its request to the DOJ, which reviews the request and then presents its conclusions to the court. See United States v. Western Elec. Co., 592 F.Supp. 846, 873-74 (D.D.C.1984).
Ameritech is a regional holding company (“RHC”) that is subject to the same restrictions as the BOCs. See United States v. Western Elec. Co., 797 F.2d 1082, 1087-89 (D.C.Cir.1986) {“Line of Business Restrictions ”). On June 16, 1988, Ameritech asked the DOJ to move for a waiver permitting it to enter certain “funding/royalty arrangements” with companies that design, develop, and manufacture telecommunications products. Under the arrangements, Ameritech would provide financial support to “facilitate these companies’ efforts to bring their ideas to market,” but “[t]he role of designing, developing, and manufacturing the products [would] he exclusively with the funded company.” Joint Appendix (“J.A.”) at 393. In return for its financial commitment, Ameri-tech would “receive royalties on the sales of the product to third parties if it is successfully developed.” Id. Ameritech further represented that all funding/royalty arrangements would include “a ‘most-favored nation’ pricing clause” ensuring that the price of .the product to Ameritech would be “no higher than that paid by third-parties.” Id. at 397 n. 3. Finally, in response to a DOJ request, Ameritech agreed that “either the regulated or unregulated side of its business may provide funding for product development but only the side of the business providing the funding would receive any royalties.” Id. at 490.
On January 4, 1989, the DOJ responded to Améritech’s request by filing a motion for a declaratory judgment that the proposed funding/royalty arrangements did not constitute manufacturing “directly or through an affiliated enterprise.” Specifically, the DOJ urged the court to declare that the term “affiliated- enterprise refers only to entities in which a BOC has a more than de minimus [sic] equity interest (5% or more) or exercises operational influence.” Id. at 434 (internal quotation marks omitted). Because the funding/royalty arrangements satisfied neither of these criteria, the DOJ claimed that they were not prohibited by section 11(D).
In the alternative, the DOJ argued in a footnote that if the court found that the funding/royalty arrangements did implicate section 11(D), “a waiver pursuant to section VIII(C) should be granted” because there was “no substantial possibility that Ameri-tech could use its monopoly power to impede competition in the markets it seeks to en-ter_” Id. at 429 n. 4. The DOJ supported this conclusion with a scant three sentences of analysis but added that it “would be willing to address in a more detailed fashion the waiver issues, if such elaboration would be of assistance to the court.” Id. at 429-30 n. 4.
More than three years later, on January 31, 1992, the district court denied the DOJ’s motion for a declaratory judgment. See United States v. Western Elec. Co., No. 82-0192, mem. op. at 6, 1992 WL 26683 (D.D.C. Jan.' 31,. 1992) {“Ameritech Decision”). The court stated that it had already “considered and rejected the Department’s contention that ‘affiliated enterprise’ be narrowly construed to apply only to those enterprise[s] in which a Regional Company has an equity interest.” Id. at 3. In particular, the court relied on United States v. Western Electric Co., No. 82-0192, 1986 WL 11238 (D.D.C. Aug. 7, 1986), rev’d on other grounds, 894 F.2d 430 (D.C.Cir.1990), in which it held that no waiver was necessary for NYNEX’s purchase of a conditional right to acquire .a company engaged in the provision of interex-change service, see id. at 6-8, but that such conditional- interests would in some eases trigger the need for a waiver, see id. at 3^4. Quoting from that case, the court determined that a waiver is required for a furiding/royalty arrangement, and by-implication there is an “affiliated enterprise” under section 11(D), whenever “a Regional Company would have ‘a substantial incentive and ability unfairly to impede competition by use of its monopoly position in the market it is entering.’ ” Am-eritech Decision, mem. op. at 4. The court then emphasized that the DOJ’s interpretation “would not alleviate the incentive and ability of the Regional Companies to engage *229in anticompetitive conduct,” id:, and would as a result “undercut the purposes of the manufacturing restrictions.” Id. at 6. The court illustrated this point in the following fashion:
It is beyond dispute ... that a Regional Company that funds in large part the activities of a small manufacturer, and that has the option of funding its activities in the future, exercises a great deal of influence over the decisions of that company regardless of whether or not it has an equity interest in the company. Nor can it be doubted that a company that stands to earn substantial royalties on the Sale of a product has an incentive to discriminate in favor of the product. There is the risk a company would cross-subsidize the price of the product and pass on artificially high prices to its ratepayers. There ,is therefore no rational basis under the decree for distinguishing the risks posed by such a royalty arrangement from those posed by an equity investment in a manufacturer.
Id. at 5-6. Finally, the court rejected the suggestion that the DOJ’s approach was preferable because it would promote greater certainty for those in the telecommunications industry. The court noted that the concept of “operational influence” in the DOJ’s interpretation “is hardly a clear-cut term,” and that in any event “perceived difficulty of resolving issues under the decree is not a basis for ignoring decree'restrictions.” Id. at 6 n. 2.
On March 3,1992, the court denied Ameri-teeh’s motion for reconsideration.- Shortly thereafter, the court issued a farther Memorandum and Order intended to “clariffy] the status of Ameritech’s waiver request,” United States v. Western Elec. Co., No. 82-0192, mem. op. at 2, 1992 WL 71395 (D.D.C. Mar. 24, 1992) (“Ameritech Waiver Ruling"), as this request had not been explicitly considered in the court’s previous pronouncements. At the outset, the court determined that “the request for a waiver was never properly before this Court” because (1) “[t]he Department did not specifically request a waiver,” (2) the DOJ discussed the waiver only in one footnote of an eighteen-page submission, and (3) the “casual discussion” contained in that footnote “does not constitute a sufficient or appropriate request to this Court for a waiver.” Id. Notwithstanding this procedural problem, the court announced that “out of an abundance of caution and to ensure that all interested parties are sufficiently clear as to the posture of this issue, the Court hereby specifically declines to grant Ameritech a waiver.” Id. According to the court, .“the conditions Ameritech suggests for its funding/royalty arrangement would not sufficiently minimize its incentives and its ability to favor a funded manufacturer”; and they “would ... require such detailed supervision as might be appropriate for a regulatory agency, not the Court.” Id. at 2-3 (footnote omitted).
The DOJ and the seven RHCs (collectively, “appellants”) now appeal the district court’s rulings. They are opposed by AT&T and a coalition comprised of the Independent Data Communications Manufacturers Association, the North American Telecommunications Association, the Telecommunications Industry Association, Tandy Corporation, and MCI Communications Corporation (collectively, “appellees”).
II. Disoussion
Appellants argue that (1) the district court erred by rejecting the DOJ’s purely structural definition of the term “affiliated enterprise”; and (2) even if the district court correctly construed that term, it should have granted Ameritech’s waiver request. We affirm the district court’s ruling on the definitional issue, although we do so on the basis of an interpretation of “affiliated enterprise” that covers all revenue sharing arrangements between the BOCs and entities engaged in prohibited businesses. We remand, however, for further consideration of the waiver request.
A. The Definition of “Affiliated Enterprise”
The district court’s construction of the Decree is subject to de novo review. See Triennial Review, 900 F.2d at 293; United States v. Western Elec. Co., 894 F.2d 1387, 1390 (D.C.Cir.1990) (“Manufacturing Appeal ”); Line of Business Restrictions, 797 F.2d at 1089. In interpreting the Decree, we .apply ordinary principles of contract law. *230United States v. ITT Continental Banking Co., 420 U.S. 223, 236-37, 95 S.Ct. 926, 934-35, 43 L.Ed.2d 148 (1975); United States v. Western Elec. Co., 894 F.2d 430, 434 (D.C.Cir.1990) (“Conditional Interest Appeal ”). This implies that the meaning of the Decree “must be discerned within its four corners,” United States v. Armour & Co., 402 U.S. 673, 682, 91 S.Ct. 1752, 1757-58, 29 L.Ed.2d 256 (1971), although we may also consult certain “aids to construction,” including “the circumstances surrounding the formation of the consent order, any technical meaning words used may have had to the parties, and any other documents expressly incorporated in the decree.” ITT, 420 U.S. at 238, 95 S.Ct. at 935; see also Manufacturing Appeal, 894 F.2d at 1390; Conditional Interest Appeal, 894 F.2d at 434.
Our inquiry begins, of course, with the text of the Decree. Unfortunately, it is not dis-positive. At no point does the Decree define the term “affiliated enterprise,” see Conditional Interest Appeal, 894 F.2d at 433; and scrutiny of sections of the Decree other than section 11(D) offers little help. Section IV(A) of the Decree defines the word “affiliate” in terms of ownership and control. It states:
“Affiliate” means any organization or entity, including defendant Western Electric Company, Incorporated, and Bell Tele- - phone Laboratories, Incorporated, that is under direct or indirect common ownership with or control by AT&T or is owned or controlled by another affiliate.
Decree Opinion, 552 F.Supp. at 228. But that section explicitly applies only for the purpose óf identifying affiliates of AT&T. Moreover, section IV(C) of the Decree suggests that “affiliated enterprise” has a broader meaning. That section defines “ ‘Bell Operating Companies’ and ‘BOCs’” to include “any entity directly or indirectly owned or controlled by a BOC or affiliated through substantial common ownership.” Id. As “owned,” “controlled,” and “common ownership” are all subsumed within the definition of a BOC, section II(D)’s reference to “affiliated enterprise” would appear to embrace entities that are related to a BOC in other ways. Cf. Brinderson-Newburg Joint Venture v. Pacific Erectors, Inc., 971 F.2d 272, 279 (9th Cir.1992) (stating that “a contract should be interpreted so as to give meaning to each of its provisions”), cert. denied, — U.S. -, 113 S.Ct. 1267, 122 L.Ed.2d 663 (1993); Restatement (Second) of Contracts § 203(a) & cmt. b (1981).
Because the text of the Decree is not dispositive as to the meaning of “affiliated enterprise,” the DOJ would have us adopt the usual corporate understanding of affiliation as a relationship involving ownership or control. See, e.g., Black’s Law Dictionary 54 (5th ed. 1979) (“affiliate company” defined as a “[c]ompany effectively controlled by another company”). Our task, however, is to apply the Decree as it was written and understood by the parties. To-this end, we must “ground[ ] [our interpretation] in the ... contemporaneous understandings of its purposes, not in our own conception of wise policy.” Conditional Interest Appeal, 894 F.2d at 434. Statements made by the parties at the time the Decree was entered and implemented clearly indicate that the term was intended to cover certain contractual relationships not involving ownership or control. Most notably, the DOJ, the “principal proponent” of the line-of-business restrictions, see Decree Opinion, 552 F.Supp. at 186 n. 227, stated on several occasions that it viewed section 11(D) as proscribing contractual arrangements under which the BOCs, as in the proposed funding/royalty arrangements, would share expenses and revenues with entities engaged in prohibited businesses. Although the DOJ’s comments refer specifically only to arrangements between the BOCs and interexchange carriers, there is no sound reason to construe “affiliated enterprise” differently for purposes of the manufacturing restriction as BOC involvement in both activities is proscribed by section 11(D).
For example, during the Tunney Act proceedings that preceded entry of the Decree, the DOJ addressed the issue of capacity sharing arrangements between .the BOCs and interexchange carriers. According to the DOJ, such arrangements would run afoul of the line-of-business restrictions “to the extent that, as a practical matter, such agreements amount to a joint venture with the sharing enterprise, or otherwise give the *231BOC a stake in its financial success, e.g., payments on a per-unit-of-traffic basis-” See Response to Public -Comments on Proposed Modification of Final Judgment, 47 ■Fed.Reg: 23,320, 23,347 (May 27, 1982). Appellants seek to discount the significance of this statement by claiming that it “concerned a draft of the decree that the district court did not enter.” Reply Brief for Appellants at 10 (emphasis in original). It is true that subsequent to these comments, the district court added section VIII(A) of the Decree, which permits the BOCs to market customer premises equipment. See Decree Opinion, 552 F.Supp. at 191-93, 231. We are not persuaded, however, that this change substantially implicates the meaning to be attributed to the term “affiliated enterprise” in section 11(D).
Similarly, immediately prior to divestiture, the question arose whether AT&T could, on an interim basis, maintain “division of revenue” arrangements with the BOCs as a means of compensating them for exchange access services. See United States v. Western Elec. Co., 578 F.Supp. 653, 654 (D.D.C.1983). When the Bell Atlantic Telephone Companies objected to these arrangements, the DOJ filed a response supporting their position. In its response, the DOJ clearly stated its view that the division of revenue arrangements violated section 11(D), notwithstanding the absence of ownership or control. According to the DOJ:
Section 11(D)(1) of the Decree provides, inter alia, that following divestiture no BOC shall provide interexchange telecommunications. That prohibition clearly extends to any arrangement, including one based on division of revenues, between a BOC and an interexchange carrier that gives the.BOC a direct financial stake in the success or failure of the interexehange carrier.
J.A. at 273 n. *. The district court subsequently endorsed this view by finding that the division of revenue proposal was “viola-tive of the decree in that it continues Operating Company participation in interexchange telecommunications prohibited by section 11(D)(1) of the decree.” United States v. Western Elec. Co., 578 F.Supp. at 655.
In other contexts, furthermore, the term “affiliate” encompasses -relations beyond ownership or control. See, e.g., 15 U.S.C. § 79b(a)(ll) (defining a company’s “affiliate[s]” to include not only entities connected through ownership and control, but also those that “stand in such relation to [the] specified company that there is hable to be ... an absence of arm’s-length bargain-ing_”). One particularly pertinent example is the FCC’s longstanding “cross-ownership” rule. This rule was developed to prevent local telephone companies from using their control over essential facilities to impede competition in the cable television market, see National Cable Television Ass’n, Inc. v. FCC, 914 F.2d 285, 287 (D.C.Cir.1990), and hence are directly analogous to section 11(D). At the- time the Decree was entered, the cross-ownership rule provided that “[n]o telephone common carrier ... shall engage in the furnishing of cable television service to the viewing public in its telephone service area, either directly, or indirectly through an affiliate owned by, operated by, controlled by, or under common control with the telephone common carrier.” 47 C.F.R. § 63.54 (1982). The regulation further explained that “the terms ‘control’ and ‘affiliate’ bar any financial or business relationship whatsoever by contract or otherwise, directly or indirectly between the carrier and the customer, except only the carrier-user relationship.” Id. Note 1(a) (emphasis added). Under this definition, which remains substantially unchanged in the current version of the cross-ownership rule, see 47 C.F.R. § 63.-54(c) (1992), a wide variety of contractual arrangements suffice to create an affiliation. See, e.g., National Cable Television Ass’n, 914 F.2d at 287-88 (illustrating that the FCC may, under that rule, find affiliation to exist based on a financing arrangement between a telephone company and a corporation engaged in the provision of cable television services).
More broadly, to the extent that the terms of the Decree are ambiguous, we are obliged by our precedent “to read the Decree’s line-of-business restrictions in light of the parties’ jointly intended purpose to stymie efforts by a local monopoly to use its stranglehold on *232essential facilities and services to thwart effective competition in areas where its monopoly position was not protected by the Decree.” Manufacturing Appeal, 894 F.2d at 1394 (internal quotation marks, brackets, and citation omitted; emphasis in original); see also Line of Business Restrictions, 797 F.2d at 1088. A definition of “affiliated enterprise” that turns entirely on ownership or control would frustrate this purpose.
As this court has explained, the line-of-business restrictions were intended to preclude three different types of anticompetitive conduct that were associated with AT&T’s predivestiture business practices:
The first was AT&T’s alleged efforts to impede independent manufacturers by affording Western Electric, AT&T’s manufacturer subsidiary, privileged access to the technical specifications of AT&T’s exchange systems. The second was AT&T’s alleged policy of “cross-subsidizing” Western Electric’s development efforts through funds derived from AT&T’s local exchange monopoly, permitting Western Electric to undercut its competitors while passing on its losses to AT&T’s service customers. And the third was AT&T’s alleged “favoritism” — its willingness to buy Western Electric products instead of cheaper, better products manufactured by Western Electric’s competitors.
Manufacturing Appeal, 894 F.2d at 1391-92 (citations omitted); see also Triennial Review, 900 F.2d at 290; Decree Opinion, 552 F.Supp. at 190-92. If an RHC provided a manufacturer with research and development funds in exchange for a continuing share in that manufacturer’s future sales, it could have a significant incentive to pursue each of the designated strategies in an attempt to protect its stake and enhance its earnings. First, the RHC could grant the manufacturer privileged access to its technical requirements or even adopit standards preferentially beneficial to that manufacturer. Such practices could enhance the manufacturer’s competitive position by giving it a substantial advantage in making sales both to the RHC and to third parties within the RHC’s operating region. Second, an RHC might engage in cross-subsidization by paying inflated equipment prices to that manufacturer in order to enable it to undersell its competitors and gain power in other markets. Third, an RHC might purchase its equipment exclusively from a manufacturer in which it has a stake, even if that manufacturer produced a higher-priced or lower-quality product. The existence of such a guaranteed market might enable the manufacturer to achieve economies of scale that would permit lower prices to third-party buyers, thereby increasing the RHC’s royalties, while foreclosing a significant share of the market from independent manufacturers.
Finally, it is noteworthy that at the outset of these proceedings, Ameritech itself apparently believed that its proposed' funding/royalty arrangements implicated the line-of-business restrictions. When Ameritech approached the DOJ about these arrangements, Ameritech did not contend that they fell beyond the ambit of section 11(D). Instead, it argued only that a waiver should be granted under section VIII(C). Thus, Ameritech clearly understood that, whatever its meaning in other contexts, the term “affiliated enterprise” as used in the Decree was intended to encompass more than ownership and control relationships.
In light of these considerations, we hold that the district court properly rejected the DOJ’s definition of the term “affiliated enterprise.” At the same time, however, we decline to endorse the district court’s test, under which an affiliated enterprise exists if a BOC has a “substantial incentive and ability unfairly to impede competition by use of its monopoly position in the market it is entering.” Ameritech Decision, mem. op. at 4 (quotation marks, ellipsis, and citation omitted). Instead, we find that the term “affiliated enterprise” covers all arrangements, contractual or otherwise, in which the BOCs have a direct and continuing share in the revenues of entities engaged in prohibited businesses. We adopt this position for several reasons.
As an initial matter, the district court’s interpretation is necessarily flawed because it overlaps with and renders inoperative the standard for granting waivers under section VIII(C). The critical consideration in deter*233mining whether a waiver is available is whether a BOC has the power — and hence the “ability” — to adversely affect competition in the market it seeks to enter. See United States v. Western Elec. Co., 969 F.2d 1231, 1241 (D.C.Cir.1992) (“CCS Waiver Opinion”); United States v. Western Elec. Co., 907 F.2d 1205, 1209 (D.C.Cir.1990) (“Distribution Waiver Opinion”); Triennial Review, 900 F.2d at 296. If, however, the “ability to unfairly impede competition” is taken into account in assessing whether an “affiliated enterprise” exists, the waiver provision will never come into play: Those arrangements rising to the level of an affiliated enterprise could not qualify for a waiver, while arrangements not constituting an affiliated enterprise could qualify for a waiver but would have no need for one.
Moreover, even in the absence of this structural defect, the district court’s test generates substantial uncertainty as to which contractual arrangements do and do not create an affiliated enterprise. The district court’s approach turns on the court’s own assessment of the competitive risks of particular arrangements. As a result, it is difficult for actors in the telecommunications industry to know ex ante which agreements they may enter without invoking the waiver process. To compound the difficulty, the district court’s test is potentially applicable to a wide variety of contractual arrangements that do not involve revenue sharing, including exclusive marketing agreements and extended supply contracts. Accordingly, the test may improperly chill arrangements that promise substantial economic benefits without meaningful risk of anticompetitive effects.
By contrast with these problems, an interpretation of affiliated enterprise that covers all revenue sharing arrangements is simple and easily administered. More to the point, however, such a reading comports with the parties’ contemporaneous understandings of the line-of-business restrictions, as reflected in the DOJ’s comments and the district court’s ruling on revenue-sharing arrangements between the BOCs and interexchange carriers. It is also faithful to our obligation to construe ambiguous terms in such a way as to effectuate the purposes of the Decree. Among the most important of these was- to “sharply limit[ ] the ability of businesses with bottleneck control' of local telephone service to utilize their monopoly advantages to affect competition in competitive markets.” Line of Business Restrictions, 797 F.2d at 1088. That’ objective would not be served if the reach of section 11(D) were limited to BOCs and entities they own or control,- as “anything that can be accomplished by ownership of two [firms in vertical markets] also can be accomplished by a properly drawn contract” between them. Richard A. Posner & Frank H. Easterbrook, Antitrust 869 (2d ed. 1981).
B. The Waiver Request
Section VIII(C) of the Decree does not merely authorize a waiver; it requires the district court to grant a waiver if “there is no substantial possibility that [the petitioning BOC] could use its monopoly power to impede competition in the market it seeks to enter.” Decree Opinion, 552 F.Supp. at 231. Under the standard established in Triennial Review, a BOC (and hence an RHC) cannot “impede competition,” as that phrase is used in section VIII(C), unless it has market power; that is, “the ability to raise prices or restrict output in the market it seeks to enter.” 900 F.2d at 296; see also CCS Waiver Opinion, 969 F.2d at 1241; Distribution Waiver Opinion, 907 F.2d at 1209. The burden of demonstrating that a waiver is appropriate rests with the petitioning BOC. Triennial Review, 900 F.2d at 296. In evaluating the district court’s waiver ruling, we review de novo the court’s interpretation of section VIII(C), but we give deference to its factual determinations under the clearly erroneous standard. See id. at 293-94.
At the outset, we reject the district court’s position that Ameritech’s “request for a waiver was never properly before [it].” Ameritech Waiver Ruling, mem. op. at 2. The DOJ did relegate discussion of a waiver to a mere footnote in its declaratory judgment motion, choosing instead to focus almost-exclusively on its preferred definition of the term “affiliated enterprise.” But other parties to the proceeding — most prominently Ameritech itself — argued the matter at length. Moreover, Ameritech carefully fol*234lowed the procedures prescribed by the district court as part of a four-year effort to obtain a waiver for its proposed funding/royalty arrangements. To hold that Ameritech was not entitled to an adjudication of its request after running this obstacle course, simply because the DOJ elected to emphasize an alternative legal theory, is rather unfair.
It is true that, because the DOJ failed to address the waiver issue in a meaningful way,'the district court did not have the benefit of the type of “predictive economic analysis” from the DOJ that this court has emphasized as being critical to making waiver decisions. See CCS Waiver Opinion, 969 F.2d at 1241; Distribution Waiver Opinion, 907 F.2d at 1209; Triennial Review, 900 F.2d at 297-98. At least in the circumstances of this case, however, the appropriate remedy for the deficiency was not to erect a procedural bar to consideration of Ameritech’s request; rather, it was to take advantage of the Department’s representation that it would “address in a more detailed fashion the waiver issues, if such elaboration would be of assistance to the court.” J.A. at 429-30 n. 4. Significantly, at oral argument, the DOJ renewed its offer to provide an economic analysis by requesting that, if its interpretation of affiliated enterprise were rejected, the case be remanded to enable it to- “address the competitive effects question in light of current market conditions and under the standard of [the] Triennial Review decision.” Transcript at 10. Our decision today will provide it with that opportunity.
Moving to the district court’s substantive ruling that Ameritech was not entitled to a waiver, we agree with appellants that this ruling is flawed because the district court failed to apply the “market power” test elaborated in Triennial Review. The district court’s cursory opinion states only that “the conditions Ameritech suggests for its funding/royalty arrangement would not sufficiently minimize its incentives and ability to favor a funded manufacturer.” Ameritech Waiver Ruling, mem. op. at 2. The proper inquiry under the market power test, however, is not whether a BOC may “favor” particular manufacturers; it is whether such favoritism is likely to result in reduced output or higher prices in a particular product or service market. As our dissenting colleague points out in his excellent analysis of current realities in the field of telecommunications, there may be good reason to believe that in this case it would not.
Appellees contend that even if we were to remand this case for' consideration under the proper standard, denial of Ameritech’s waiver request would follow directly from Triennial Review. In that case, we declined to lift the manufacturing restriction on the ground that, at least in the market for telecommunications equipment (i.e., transmission equipment and central office switches), the BOCs continued to possess sufficient market power to enable them to reduce output and raise prices by purchasing equipment exclusively from their “manufacturing affiliates” and cross-subsidizing those affiliates. See Triennial Review, 900 F.2d at 303. Appellees appear to claim that this conclusion applies equally well to entities that are linked to a BOC through funding/royalty arrangements as it does to those that are owned or controlled by one.
We find that Triennial Review does not foreclose Ameritech’s waiver request. The question presented in that case was Whether there should be a “complete removal of the manufacturing restriction.” Id. at 304 (emphasis in original). Accordingly, there is not even a hint that we considered the different ways in which a BOC might be affiliated with a manufacturer, or the effects that various forms of affiliation might have on a BOC’s ability to exercise market power in telecommunications product markets. Moreover, at least on théir face, the proposed funding/royalty arrangements appear likely to limit the potential for Ameritech to engage in the forms of anticompetitive conduct that the manufacturing restrictions were designed to prevent. As the district court observed in modifying the Decree to permit the BOCs to market customer premises equipment (“CPE”), “[ajnticompetitive activities undertaken by two separate corporations rather than by two components of the same corporation are likely to be' far more difficult to accomplish because of increased problems of coordination and the greater possibility of *235detection.” Decree Opinion, 552 F.Supp. at 191; see also United States v. Western Elec. Co., 569 F.Supp. 1057, 1089 (D.D.C.1983) (permitting the BOCs to sublicense consumer premises equipment patents to independent manufacturers on essentially the same grounds). Ameritech’s proposal also includes a series of conditions that further diminish the likelihood of anticompetitive activity. In light of Triennial Review’s apparent view that the rationale for continuing the manufacturing restrictions was less than overwhelming, particularly with respect to the CPE market, see 900 F.2d at 304-05 (upholding the district court’s refusal to modify the Decree largely on burden of proof grounds), it may well be that Ameritech’s diminished ability to pursue anticompetitive practices through funding/royalty arrangements is sufficient to warrant some form of waiver.
Turning first to the matter of eross-subsi-j dization, Ameritech’s proposal includes several safeguards designed to minimize the possibility that it could cross-subsidize the funded manufacturer with revenues from its local exchange monopoly. “Cross-subsidization may take a variety of forms.” United States v. Western Elec. Co., 592 F.Supp. at 853. Perhaps the most common approach is for the price-regulated firm to invest in an activity (e.g., research and development) that is necessary for its regulated business, but which also contributes to a good or service to be sold in unregulated markets. By allocating the joint costs disproportionately to the regulated side of the business and passing them on to ratepayers, the firm obtains a cost advantage in the unregulated market, which it can exploit either by reaping supra-competitive profits or by engaging in predatory pricing against its competitors. See id. This form of cross-subsidization, however, is effectively impossible under Ameritech’s proposal. Because Ameritech’s role would be limited to providing financial assistance to a manufacturer who bore sole responsibility for designing, developing, and manufacturing the products, there would be no incurring of joint costs, and hence no possibility that the costs could be misalloeated. Moreover, Ameritech has agreed that royalties would be paid only to the side of the business providing the funding, thereby ensuring that ratepayer money would not bankroll telecommunications products investments that would yield returns to the unregulated side of the business.
■ An alternative form of cross-subsidization postulated by appellees is for the regulated firm to purchase products from a manufacturing affiliate at inflated prices. The firm then passes the costs on to ratepayers, while the affiliate may'exploit its excess profits by underselling competitors to gain power in the product market. The risk of this form of cross-subsidization, however, is limited in the first instance by Ameritech’s most favored nation clause, which would ensure that the price paid to a funded manufacturer would be no greater than the market price paid by third parties. Even if the most favored nation clause proved unenforceable, however, this type of cross-subsidization seems unlikely. Ameritech would "receive no direct benefit from the purchase of equipment at inflated prices, as the proposed arrangements provide for the payment of royalties only on sales to third parties. Instead, Ameritech would benefit only if the manufacturer used the proceeds of the sales to reduce the price of its product to third parties, thereby increasing sales volume and hence Ameritech’s royalties. This possibility strikes us as highly speculative, especially in light of the manufacturer’s independence from Ameritech control. Moreover, if a manufacturer were to engage in such a scheme, it would run the risk of detection by either its competitors or Ameritech’s regulators. Cf. Decree Opinion, 552 F.Supp. at 192 (observing that “the participation of a second company would probably make cross-subsidization far easier to detect”).
Moving to the question of discriminatory interconnection, Ameriteeh’s proposal does not entirely eliminate the risk that it would provide a funded manufacturer with privileged access to its technical requirements or adopt standards preferentially, beneficial to that manufacturer. Nevertheless, it is likely that interconnection standards that systematically favor funded manufacturers would be highly conspicuous. Cf. id. at 191 (noting that “it would be quite difficult for an Operating Company to conspire successfully with *236a manufacturer to provide advance information about revised network standards or to impose interconnection restrictions which favored that manufacturer’s products and no one else’s”); see also id. at 191-92 n. 246. Moreover, appellants claim that such preferential standards would be counterproductive in that they would make the manufacturer’s product less compatible with other systems, hence less attractive to buyers outside of Ameritech’s region, on whom its royalties largely depend. This argument has some force, but we note at least two reservations that are worth exploring on remand. First, it might be possible for a product to include certain “optional” features that would enable it to meet Ameritech’s technical requirements without diminishing its attractiveness in other regions. Second, in the case of CPE, Ameritech’s region may by itself constitute a sufficiently large market for sales to third parties that it would be profitable for Ameritech to develop discriminatory standards favoring a funded manufacturer.
Finally, as appellees point out, the funding/royalty arrangements might result in Ameritech purchasing equipment solely from its funded manufacturer, regardless of whether that manufacturer’s product represents the best price/quality combination. Accordingly, there would likely be some foreclosure of the relevant markets to independent manufacturers. Still, Triennial Review found that this foreclosure would not, by itself, lead to the exercise of power in the CPE market “[s]ince the BOCs purchase only a minute percentage of the nation’s CPE output.” 900 F.2d at 304. The risks posed by foreclosure in the telecommunications equipment market are more substantial, although it is worth noting that Triennial Review relied on both cross-subsidization and foreclosure in deciding not to lift the manufacturing restriction. See id. at 303. To the extent that the funding/royalty arrangements reduce the risk of cross-subsidization, a waiver might still be appropriate.
Before closing, it is important to address the district court’s concern that the conditions included in Ameritech’s proposal would ■ be difficult to' enforce. We agree that it is entirely proper for the district court to consider the enforceability of proposed Decree modifications. We also recognize that the broad, prophylactic line-of-business restrictions were necessitated in part by AT&T’s ability to evade regulatory constraints, see Decree Opinion, 552 F.Supp. at 167-68, a pattern of activity that could well be replicated by the BOCs, see United States v. Western Elec. Co., 673 F.Supp. 525, 566-67 (D.D.C.1987) (discussing several examples of discriminatory interconnection and cross-subsidization by the BOCs), aff'd in part, Triennial Review, 900 F.2d 283 (D.C.Cir.1990). We must insist, however, that if the district .court is to rely on enforceability concerns in denying waiver requests, it must do so on a consistent basis.
In the present case, the district court’s concern for enforceability may be well-founded with respect' to Ameritech’s most favored nation pricing clause, as price comparisons may be inhibited by the heterogeneous, highly customized nature of many telecommunications products. But cf. Distribution Waiver. Opinion, 907 F.2d at 1210 (encouraging the grant of a waiver to enable an RHC’s subsidiary to distribute telecommunications products, in part on the ground that sales to third parties could “provide benchmarks that would ease detection of ... overcharges” on sales to the RHC). Still, the remaining conditions — the requirement that royalties be paid only on sales to third parties and Ameri-tech’s representation that only the side of the business providing the funding would receive the royalties — do not appear to be significantly different from conditions imposed in other waivers that the district court has approved. For example, in United States v. Western Elec. Co., Civ.A. No. 82-0192, 1987 WL 10108 (D.D.C.1987), the court granted a waiver to allow NYNEX to enter the advertising business on the conditions that (1) the business would be conducted through a separate corporate entity, (2) the business would obtain its own debt financing without NYNEX’s assistance, (3) the total revenues of the advertising business would not exceed ten percent of NYNEX’s total net revenues, and (4) there would be no joint marketing with NYNEX’s operating telephone company. See id. at *l-*2; see also United States v. Western Elec. Co., Civ.A. No. 82-0192, *2371989 WL 13378, at *6 (D.D.C. Feb. 13,1989) (permitting Pacific Telesis to acquire an interest in a company providing interexchange telecommunications between Japan and North America as long as the business was conducted through a separate corporate entity and Pacific Telesis would not discriminate against competing interexchange carriers); United States v. Western Elec. Co., 592 F.Supp. at 871-72 (indicating that the court would consider waiver requests to permit the RHCs to engage in nontelecommunications businesses, but. that the waivers would require that those businesses (1) be conducted through a separate subsidiary, (2) obtain their own debt financing without the BOC’s assistance, (3) not exceed ten percent of a BOC’s net revenues, and (4) agree to certain monitoring requirements). Accordingly, if the district court is to rely on enforceability concerns with respect to these aspects of Ameritech’s request, further explanation is required.
III. CoNClusion
Throughout their arguments to this, court, appellants have emphasized that, in the absence of ownership and control, a funding/royalty arrangement between an RHC and a manufacturer poses few competitive risks. In light of the realities of today’s telecommunications product markets, they may well be right. Scores of new companies are competing vigorously in virtually every area of the market, and the stringent prophylactic measures adopted in 1982 by the parties to the Consent Decree may no longer be necessary- in order to forestall potential abuses of monopoly power by the BOCs. It is for this reason that the. Decree permits any BOC to seek adjustment to changed economic circumstances by either applying to the district court for a modification of its provisions under section VII or for a waiver under section VIII(C). Our task, however, is to apply the Decree as it was written and understood by the parties, and not as it might have been written if they had had the benefit of hindsight. We therefore affirm the district court’s denial of the DOJ’s declaratory judgment motion, and we remand the case for further exploration of the waiver request as it is under the waiver provision that the potential for anticompetitive abuses is properly considered.
So ordered. .