Affirmed by published opinion. Judge NIEMEYER wrote the majority opinion, in which Chief Judge WILKINSON joined. Judge LUTTIG wrote a dissenting opinion.
OPINION
NIEMEYER, Circuit Judge.The Secretary of Agriculture denied the applications of farmers Earl McDaniels, Randolph Lovett, and Alton Brown for livestock disaster relief because each farmer’s 1997 gross revenue exceeded $2.5 million, making him ineligible for assistance under applicable Department of Agriculture regulations. In this action, brought under the Administrative Procedure Act, the farmers challenge these regulations, contending that they are arbitrary and capricious because gross revenue is defined to include pass-through funds — in this case, sales of bailment tobacco — in which the farmers had no interest.
The district court held that the applicable regulations were “reasonable and a permissible construction” of the enabling statute and affirmed the Secretary’s decision. For the reasons that follow, we affirm the judgment of the district court.
I
In October 1998, Congress established the 1998 Crop Loss Disaster Assistance Program (“CLDAP”) and the 1998 Emergency Livestock Feed Assistance Program (“LAP”). To fund these programs, it appropriated, as an emergency measure, $1.5 billion to “producers on a farm who have incurred losses in the 1998 crop due to disasters,” 1999 Appropriations Act § 1102(b), 112 Stat. 2681, 2681^13, and $200 million “to make available livestock feed assistance to livestock affected by disasters,” id. § 1103, 112 Stat. at 2681-44.1 Congress directed that the Secretary of Agriculture distribute the disaster relief in a “fair and equitable manner,” id. § 1101(a), 112 Stat. at 2681-42, and empowered the Secretary to determine “eligibility and payment limitation criteria,” id. § 1101(b)(3), 112 Stat. at 2681-42. To “implement” the 1999 Appropriations Act, Congress instructed the Secretary and the Commodity Credit Corporation, “as appropriate,” to issue “such regulations as are necessary” “[a]s soon as practicable after *409the date of enactment.” Id. § 1133(a), 112 Stat. at 2681-47. In addition, Congress directed that the regulations be promulgated “without regard to the notice and comment provisions of section 553 of title 5, United States Code [the Administrative Procedure Act].” Id. § 1133(a)(1), 112 Stat. at 2681-47 (internal subdivision omitted). Congress also provided that any such regulations take effect immediately under 5 U.S.C. § 808, before congressional review is undertaken pursuant to 5 U.S.C. § 801. Id. § 1133(b), 112 Stat. at 2681-47.
In accordance with Congress’ instructions, the Department of Agriculture issued regulations for the implementation of the 1998 Single-year and Multi-year Crop Loss Disaster Assistance Program and Emergency Livestock Assistance. See 7 C.F.R., Parts 1477, 1439. In these regulations, the Secretary defined eligibility criteria for receiving benefits, establishing in particular and as applicable here, the criterion that no person may receive benefits “who has gross revenue in excess of $2.5 million for the 1997 tax year.” 7 C.F.R. § 1477.106(f); see also id. § 1439.11. Section 1477.106(f) then defines gross revenue as the “total gross receipts of the person,” which are not to be reduced “for costs, expenses or pass-through funds.” And “pass-through funds” are defined as money “that goes through, but does not remain in, a person’s account, such as money collected by an auction house.” Id. § 1477.103. Finally, the regulation specifies that persons who receive “50 percent or less of [their] gross receipts from farming and ranching” may still receive assistance, but only if their 1997 gross revenue “from all sources” was less than $2.5 million. Id. § 1477.106(f).
II
Earl McDaniels, Randolph Lovett, and Alton Brown are farmers in South Carolina who derive less than 50% of their income from farming. Each, however, suffered losses in his South Carolina farming operations and therefore applied to the Farm Service Agency (“FSA”) of the Department of Agriculture for livestock disaster assistance under the CLDAP and the LAP. The FSA administers the distribution of benefits for disaster assistance on behalf of the Department of Agriculture. As these farmers received less than 50% of their gross income from farming and ranching, their eligibility for assistance depended on whether their total 1997 gross revenue “from all sources ” was less than $2.5 million. Because each farmer had gross revenue that exceeded $2.5 million, when pass-through funds from tobacco auctions at warehouses in which they had an interest were included, the FSA denied the farmers benefits.
McDaniels owned a one-third partnership interest in New Tabor Warehouse, located in Tabor City, North Carolina. The 1997 sales for New Tabor Warehouse were more than $10 million (6 million pounds of tobacco at $1.68 per pound). Lovett owned a two-thirds interest in the stock of Big L Warehouse, Inc., a sub-chapter S corporation, which owned and operated a tobacco warehouse in Mullins, South Carolina. The 1997 sales for Big L Warehouse totaled $10.7 million. And Brown owned 100% of the stock of Brown Brothers Warehouse, Inc., which operated a tobacco warehouse located in Kingstree, South Carolina. The 1997 sales for Brown Brothers Tobacco Warehouse totaled $3.3 million (approximately 2 million pounds of tobacco at $1.68 per pound).
Some of the tobacco auctioned at each of these warehouses was owned by the warehouse owners, but most was owned by other producers, who stored their tobacco at and auctioned it from the warehouse under a bailment arrangement. Proceeds *410from the auction sales of tobacco were paid by the purchasers to the tobacco warehouses and deposited in the warehouses’ bank accounts. In the case of McDaniels, the purchasers paid the warehouse partnership which, after retaining sales commissions, distributed the net proceeds to the tobacco owners. In the case of the Big L and Brown Brothers warehouses, the warehouse owners advanced the purchase price to the tobacco owners and then billed the purchasers for the advance plus a sales commission. But in all cases, the proceeds of the auction sales of bailment tobacco passed through the warehouses’ bank accounts.
The FSA determined that each of the farmers’ gross revenue, including the receipts from auction sales at the tobacco warehouses, exceeded $2.5 million and therefore denied the farmers’ applications for benefits. The farmers appealed the FSA’s rulings to the Department of Agriculture’s National Appeals Division, asserting in particular that because they never took title to the bailment tobacco sold from their warehouses on behalf of third party producers, it was erroneous to treat the proceeds of bailment tobacco as revenue. Following separate evidentiary hearings, the National Appeals Division affirmed the FSA’s determinations. Finally, the Director Review Determinations affirmed the appellate decisions.
After exhausting their administrative remedies, the farmers filed separate complaints in the district court for judicial review of the agency’s final decisions, pursuant to the Administrative Procedure Act. The district court upheld the agency determinations, concluding that the Secretary properly applied the applicable regulations in denying the farmers’ request for relief. The court noted that 7 C.F.R. § 1477.106(f) dictates the inclusion in gross revenue of the tobacco warehouse sales, including pass-through funds. Because each farmer’s gross revenue from those sales, as defined by the regulation, exceeded $2.5 million, the court concluded that the Secretary properly denied relief. On the farmers’ challenge to the regulations themselves, based on their inclusion of pass-through funds as part of gross revenue, the court held that the Secretary’s regulations were reasonable and “a permissible construction of the 1998 Act.”
These appeals followed, and, because each farmer presents the same issue, they have been consolidated.
Ill
The farmers agree that a proper application of the regulations required the Secretary to deny them disaster assistance because each had gross revenue in excess of $2.5 million when including the pass-through funds realized from auction sales of bailment tobacco. They contend, however, that the regulations themselves exceed the Secretary’s statutory authority, which requires the Secretary to distribute the benefits in a “fair and equitable manner.” They also contend that the regulations are unreasonable, arbitrary, and capricious because they include, as a component of gross revenue, pass-through funds for bailment tobacco sales even though the farmers “neither owned title to the tobacco nor had a right to the proceeds from the bailment sales.” They point out that the Secretary provided no explanation of why such funds were included in gross revenue. The farmers assert that, but for the inclusion of pass-through funds, they would have qualified for disaster assistance.
We therefore must determine whether the Secretary acted reasonably and in accordance with his authority when he adopted regulations, basing eligibility for *411the 1998 disaster relief funds on gross revenue that included pass-through funds.
“[W]hen it appears that Congress delegated authority to [an] agency generally to make rules carrying the force of law,” we give great deference to an “administrative implementation of [the] particular statutory provision.” United States v. Mead Corp., 533 U.S. 218, 226-27, 121 S.Ct. 2164, 150 L.Ed.2d 292 (2001). And in determining whether the agency acted within the scope of its power, we are “confronted with two questions.” Chevron U.S.A., Inc. v. Natural Resources Defense Council, Inc., 467 U.S. 837, 842, 104 S.Ct. 2778, 81 L.Ed.2d 694 (1984). “First, always, is the question whether Congress has directly spoken to the precise question at issue. If the intent of Congress is clear, that is the end of the matter.” Id. at 842-43. Even if Congress’ intent is ambiguous, we defer to the agency’s construction of the statute, asking only “whether the agency’s answer is based on a permissible construction of the statute.” Id. at 843. At bottom, when Congress delegates “authority to the agency to elucidate a specific provision of [a] statute by regulation[,][s]uch legislative regulations are given controlling weight unless they are arbitrary, capricious, or manifestly contrary to the statute.” Id. at 843-44; see also Mead, 533 U.S. at 227.
In this case, we cannot imagine how Congress could have been more clear in its delegation of authority to the Secretary. In enacting the 1999 Appropriations Act, Congress gave the Secretary instructions to distribute the appropriated disaster relief funds in a “fair and equitable manner ... in all affected geographic regions of the United States,” 1999 Appropriations Act § 1101(a), 112 Stat. at 2681-42, and authorized the Secretary to determine “eligibility and payment limitation criteria,” id. § 1101(b)(3), 112 Stat. at 2681-42. Congress appropriated the money on an emergency basis and directed that regulations be promulgated as soon as practicable, bypassing public notice and comment, as well as prior congressional review. Id. § 1133, 112 Stat. at 2681-47.
Acting within these broad criteria to distribute the limited funds available, the Secretary narrowed the class of persons eligible by adopting the uniform and objective criterion of gross revenue, determining that $2.5 million in gross revenue was the cutoff point for disaster relief under these programs. Without adopting complex administrative criteria for determining what might constitute other measures of economic strength, such as net revenue or net income' — -undoubtedly recognizing the bureaucratic delay that would ensue — the Secretary adopted a gross revenue criterion and defined gross revenue simply to be gross receipts without any adjustments:
Gross revenue includes the total income and total gross receipts of the person, before any reductions. Gross revenue shall not be adjusted, amended, discounted, netted or modified for any reason. No deductions for costs, expenses or pass-through funds will be deducted from any calculation of gross revenue.
7 C.F.R. § 1477.106(f). The adoption of this qualifying criterion for entitlement to relief clearly falls within the statutory authorization to the Secretary to determine “eligibility criteria.” Because the regulations were a direct response to Congress’ express grant of legislative authority, we must give the regulations controlling weight.
The farmers argue that the regulations should not be given controlling weight because the eligibility criteria chosen are “arbitrary, capricious, or manifestly contrary to the statute” in that they do not meet the statutory requirement of be*412ing “fair and equitable” and because the Secretary, in promulgating the regulations, did not provide an explanation for the eligibility criteria.
But Congress expressly provided that the Secretary need not provide an explanation for eligibility criteria. In the 1999 Appropriations Act, Congress authorized the Secretary to promulgate regulations without regard to the notice and comment requirements of the Administrative Procedure Act (“APA”). Thus, the Secretary was not required to explain his reasoning. See 5 U.S.C. § 553(c) (requiring “a concise general statement of [a regulation’s] basis and purpose” only “[a]fter consideration of the relevant matter presented” during the comment period). The only limitation on the Secretary’s authority, therefore, was that it had to be exercised in a reasonable manner. See Chevron, 467 U.S. at 845 (stating that, where Congress does not specify an intent with regard to how an agency should exercise its discretion, the question before a reviewing court is whether the agency’s action was reasonable).2
Even though reasonable minds might differ as to whether eligibility criteria based on gross revenue — as distinct from net income, assets, or net worth — were the best choice to measure a farmer’s economic strength and therefore need for relief, there can be no doubt that the basis chosen for eligibility was reasonable. Gross revenue is an economic measure of the size of a farmer’s operations, just as are net income, assets, and net worth. While gross revenue may overstate the size of an operation because its net income may be only a small portion, net income could be just as imprecise, failing to identify a large operation that is managed poorly or in which substantial individual incomes are sheltered as items of cost. There is no doubt that more precise definitions of economic strength could be made, but with more precise definitions come the disputes *413over appropriate accounting methods and other similar issues.
The choice of measuring a farmer’s economic strength by gross revenue can rationally be justified as a way to “allow relief to be made available quickly, and effectively, within the limits of the funding available for this program.” 64 Fed.Reg. 18553, 18554 (Apr. 15, 1999). Using gross revenue as the basis for eligibility eases the administrative burden of calculating each farmer’s income. Lumping pass-through funds with revenue reduces the likelihood of sellers manipulating the structure of their transactions to convert non-deductible costs of goods sold into deductible pass-through funds. And, as perhaps the most objective criterion available, it avoids the possibility of inefficient farmers benefiting more than efficient ones, as well as the potential for manipulating income through creative accounting.
In sum, we conclude that the selection of a gross revenue criterion without deductions of any kind, including pass-through funds, was a rational application of the Secretary’s authority to distribute funds in a fair and equitable manner.
Accordingly, we affirm the judgment of the district court.
AFFIRMED.
. These programs were established and funded as part of the Omnibus Consolidated and Emergency Supplemental Appropriations Act of 1999, Pub.L. No. 105-277 (Oct. 21, 1998), 112 Stat. 2681 et seq., 7 U.S.C. § 1421 note (2000) (referred to in this opinion as the "1999 Appropriations Act”).
. Our dissenting colleague has overlooked Congress' expressed intent to enact the 1999 Appropriations Act as an emergency matter, without notice and comment, and to give the agency broad discretion on how to distribute the appropriated assistance. When Congress exempts an agency from the APA’s requirement of providing a rationale for its regulation and does not specify how the authorized discretion is to be exercised, our review is whether the agency's regulation is reasonable, see Chevron, 467 U.S. at 845, a review not unlike the evaluation of a statute's constitutionality under the traditional rational basis review. See also Motor Vehicle Manuf. Ass'n of the United States, Inc. v. State Farm Mut. Auto. Ins. Co., 463 U.S. 29, 43-44, 103 S.Ct. 2856, 77 L.Ed.2d 443 (1983) (noting Congress' express requirement of a record of the agency's rulemaking proceedings as relevant to the conclusion that the agency had not articulated a sufficient explanation for its action).
Any inquiry, therefore, into the rationality of the rule examines the rule itself to determine whether any reasonable basis can support it; it does not speculate on the rule's application. See Pension Benefit Guar. Corp. v. R.A. Gray & Co., 467 U.S. 717, 729, 104 S.Ct. 2709, 81 L.Ed.2d 601 (1984) (holding that as long as "a statute is supported by a legitimate legislative purpose furthered by rational means, judgments about the wisdom of such legislation remain within the exclusive province of” the promulgating entity); Lindsley v. Natural Carbonic Gas Co., 220 U.S. 61, 78, 31 S.Ct. 337, 55 L.Ed. 369 (1911) (holding that under rationality review, a law should be invalidated only where it lacks "any reasonable basis and therefore is purely arbitrary”). And in determining whether a reasonable basis for the rule exists, we need not determine whether that basis is the actual reason for which the rule was passed. See, e.g., U.S. R.R. Ret. Bd. v. Fritz, 449 U.S. 166, 179, 101 S.Ct. 453, 66 L.Ed.2d 368 (1980) ("Where, as here, there are plausible reasons for Congress' action, our inquiry is at an end. It is, of course, 'constitutionally irrelevant whether this reasoning in fact underlay the legislative decision' ” (quoting Flemming v. Nestor, 363 U.S. 603, 612, 80 S.Ct. 1367, 4 L.Ed.2d 1435 (1960))).