The estate of David J. Hallett, deceased, and the parents and brother of the deceased (Hallett) appeal dismissal by summary judgment of their action seeking a declaratory judgment against St. Paul Fire and Marine Insurance Company. We affirm.
Facts
At all times material to the issues herein, D. Gordon Willhite was a partner in the Seattle law firm of Sax & Maclver. On Friday, November 17, 1984, at the end of a normal business day, Willhite walked to a nearby restaurant, where he consumed about 10 Manhattans between 6 p.m. and 11:30 p.m. Initially, he was with a friend and was later joined by another partner in the firm, with whom he discussed firm business for a substantial period of time. Willhite paid for the drinks with a firm credit card, but there was evidence the firm later refused to honor the charge.
On his way home, Willhite drove his car over the center line of the street and collided with a motorcycle driven by David Hallett, who died as a result of the accident. There was evidence Willhite was under the influence of alcohol at the time of the accident.
*569Willhite was driving a 1978 BMW, which he leased for his personal use from a commercial lessor. Sax & Maclver did not participate in the lease of this vehicle. Willhite treated the car as a business car on his 1984 tax return, representing that he used the car for business 70 percent of the time. Willhite carried an automobile policy with American Economy Insurance Company, insuring his personal liability up to $300,000.
The subject of this action is a policy written for Sax & Maclver by St. Paul, providing excess liability insurance protection; that is, it paid claims up to its limit of liability after any other insurance applicable to the loss had been used up. Its limit of liability is $500,000.
The St. Paul policy provided liability coverage for non-owned automobiles. That section of the policy defines "covered autos" as follows:
/x/ Hired autos only. We'll cover autos you lease, hire, rent or borrow. This doesn't include autos you lease, hire, rent or borrow from any of your employees or members of their households.
/x/ Non-owned autos only. We'll cover autos you don't own, lease, hire or borrow which are used in connection with your business. This includes autos owned by your employees or members of their households but only while used in your business or your personal affairs.
/x/ Optional partnership coverage. We'll protect your partnership against liability claims that result when any of your partners uses an auto owned by the partner or by a member of his or her household for your business. We'll also protect the remaining partners against liability claims, but we won't protect the owner of the auto.
Sax & Maclver purchased all three coverages. The annual premium for the hired auto coverage was $32; for the non-owned auto coverage it was also $32; and for the optional partnership coverage the premium was $547.
*570The Wrongful Death Action
On February 14, 1985, Hallett brought a wrongful death action against Willhite, his wife and their marital community. Hallett did not sue Sax & Maclver and did not allege that the firm was in any way responsible. On May 16, 1986, Hallett entered into a settlement agreement with Mr. and Mrs. Willhite and their insurer, American Economy. The Willhites agreed that judgment in the amount of $750,000 would be entered against them. American Economy agreed to pay out the limit of its policy in the amount of $300,000. Hallett agreed not to execute on the remainder of the judgment. On July 2, 1986, judgment was entered against Willhite and his marital community for $750,000.
The Declaratory Judgment Action
On July 18, 1986, Hallett filed a complaint seeking a declaratory judgment that 'through the St. Paul policy insuring Sax & Maclver, St. Paul also insured the individual liability of Willhite. In the complaint for declaratory judgment, Hallett alleged that the BMW leased by Willhite was a "covered auto” and that Willhite was a protected person under the terms of the St. Paul policy. The complaint sought an order declaring that the claims made by the plaintiffs were covered by the St. Paul insurance policy and sought judgment against St. Paul for the balance due on the judgment against Willhite.
The parties filed cross motions for summary judgment, and on December 19, 1986, the trial court denied Hallett's motion, granted St. Paul's motion, and dismissed the complaint with prejudice.
Willhite's Individual Liability Not Covered
The principal issue in this appeal is whether the St. Paul policy provides coverage for Willhite's individual liability.
One cannot become an insured in a liability insurance policy without language making him an insured. There is no language in this policy making Willhite an insured. Under the heading, "Who's protected under this agreement", the policy states the owner of a hired auto is not *571protected and the owner of a covered auto, if someone other than Sax & Maclver, is not protected.
Hallett argues that Willhite's BMW is a "covered auto" and then states in his brief that from that fact, "it follows that he is a protected person under the policy." Brief of Appellant, at 24. Hallett's brief correctly recognizes that for St. Paul to be liable, two requirements must be satisfied: (1) Willhite's BMW must be a covered auto, and (2) Willhite must be an insured. In making this argument, Hallett relies upon the first sentence of the coverage for nonowned autos only, which reads:
We'll cover autos you don't own, lease, hire or borrow which are used in connection with your business.
Both parties agree that the use of the words "you" or "your" refer to Sax & Maclver. Both parties discuss the issues in a context treating Sax & Maclver as a legal entity, separate from the individual partners. This is consistent with the context in which the policy language refers to Sax & Maclver as the "insured" entity and refers to the partners as being separate from the law firm.1
Hallett contends the above quoted provision makes Willhite's BMW a covered auto because it is clear that Sax & Maclver did not own, lease, hire or borrow the car, and Willhite admitted in his deposition that he used it in connection with law firm business.
St. Paul responds that this sentence requires that the use of the auto at the time liability arises must be in the course and scope of the law firm's business.
Thus, we have two reasonable interpretations which would normally call for application of the rule that when an insurance contract is fairly susceptible to two or more reasonable interpretations, that interpretation most favorable *572to the insured must be employed. Greer v. Northwestern Nat'l Ins. Co., 109 Wn.2d 191, 743 P.2d 1244 (1987).
In this case, however, whether we treat Willhite's BMW as covered or uncovered, the result is the same because Willhite is not an insured and thus has no personal liability protection under the St. Paul policy.
Hallett argues in his brief that since Willhite was driving a covered auto, it follows that he is a protected person, and to support that position Hallett quotes a sentence from the appropriate section of the policy, which reads: "This agreement provides excess insurance for any covered auto."
The sentence relied upon says nothing about whose liability is insured by the policy. It deals only with the type of coverage on a "covered auto."
The policy provision relating to optional partnership coverage provides a clear answer to Hallett's argument. That provision reads:
"We'll protect your partnership against liability claims that result when any of your partners uses an auto owned by the partner or by a member of his or her household for your business. We'll also protect the remaining partners against liability claims, but we won't protect the owner of the auto.
Willhite was the owner of the BMW. The optional partnership coverage provides that if the partnership should be liable for a partner's tortious conduct while using his own auto, the partnership and the individual partners have excess liability insurance protection covering that claim. The provision clearly states, however, that the owner of the auto is not covered.
There is no ambiguity in this language, and it is not contradicted by any other policy provision.
Given its clear meaning, the provision is not unreasonable. It provides coverage for the firm and the partners in those situations where the firm and individual partners are found vicariously liable for the tort of one of the partners while driving his own auto. It avoids the obviously increased risk of providing individual coverage for the *573partner who is the tortfeasor. To construe the policy as providing personal liability coverage for the tortfeasor partner would amount to providing excess liability insurance coverage for the personal automobile liability of all of the partners in the firm for $547 per year. The policy language makes it clear that Willhite's personal liability to Hallett is not covered by the St. Paul policy.
Law Firm's Vicarious Liability
Lastly, Hallett contends that St. Paul's cross motion for summary judgment should not have been granted because there are genuine issues of material fact on the question of whether Sax & Maclver is also liable for Willhite's tortious conduct. A review of Hallett's complaint in the wrongful death action and the amended complaint in the declaratory judgment action reflects that Hallett has never stated or attempted to litigate a cause of action against Sax & Maclver or the individual partners of that firm. Hallett alleged both in his complaint and amended complaint that Willhite's BMW was a business car used about 70 percent of the time for business purposes. However, that argument was made in an effort to establish that the BMW was a "covered auto".
The amended complaint in paragraph 14 contains the sentence, "Sax & Maclver, and the defendant co-partners, are legally responsible for the damages caused by Willhite to plaintiffs." However, in the relief requested in the amended complaint, the only reference to Sax & Maclver and the defendant individual partners is a prayer that the decision on coverage be made binding on each and all of them. The amended complaint prays that a judgment against St. Paul be awarded for the balance due on the judgment against Willhite, but there is no prayer for a judgment in damages against Sax & Maclver and the individual partners.
In the wrongful death action in which a judgment was obtained against Willhite, there was no effort by Hallett to establish a cause of action or recover damages from the law *574firm. We must conclude that Hallett has not alleged a cause of action against the law firm. Under these circumstances, there could be no material issues of fact to be resolved on a claim that the law firm and the partners are liable to Hallett since no such claim has been alleged or litigated.
St. Paul seeks attorney's fees on appeal on the theory that Hallett's appeal is frivolous. A frivolous appeal is one presenting no debatable issues upon which reasonable minds might differ. Streater v. White, 26 Wn. App. 430, 613 P.2d 187, review denied, 94 Wn.2d 1014 (1980). The appeal in this case is not frivolous.
The judgment of the trial court is in all respects affirmed.
Williams, J., concurs.
Washington applies generally the aggregate theory of partnership, which is that a partnership is not a legal entity separate from the partners, but is simply a group of individuals doing business under an assumed partnership name. Since both parties proceed on the theory that it was the intention of the contracting parties to treat the partnership as an entity, we will proceed on the same basis.