Appellant Frank Music appeals from a grant of summary judgment in favor of the Western Conference of Teamsters Pension Trust Fund and the denial of his cross-motion for summary judgment. For the reasons stated below, we reverse the judgment of the district court.

Frank Music (hereinafter "Music") was a participant in the Western Conference of Teamsters Pension Trust Fund (hereinafter "Trust Fund") for approximately 20 years before he suffered a disabling heart attack on November 6, 1975, at age 47.

Music thereafter applied for federal social security disability benefits (hereinafter "federal disability"). In August of 1976, the Social Security Administration declared Music permanently disabled and therefore eligible to receive those benefits. The federal disability insurance program requires a "waiting period" of five full, consecutive calendar months between the date an applicant first becomes disabled and the applicant's "date of entitlement", upon which he or she is eligible to receive benefits. 42 U.S.C. § 423(c)(2). Music was therefore declared eligible to receive federal disability benefits as of May 1, 1976, which was five full consecutive calendar months after his November heart attack. His federal disability benefits were paid retroactive to that date.

In August of 1976, Music submitted an application to the Trust Fund for disability retirement benefits (hereinafter "union disability pension."). The Trust Fund determined that Music was eligible to receive a disability pension,1 and went about computing the amount of his monthly benefit payments.

Both at the time of Music's application for benefits and at the time of his disabling heart attack, the Pension Plan of the Western Conference of Teamsters (hereinafter "pension plan") required that a disabled employee be receiving federal disability benefits before she or he was eligible to receive a union disability pension.2 Music was therefore not eligible to receive a union disability pension until May 1, 1976, the date on which he became eligible for federal disability benefits. The Trust Fund fixed the amount of his monthly disability benefits by the terms of the pension plan in force on May 1, 1976 (hereinafter "the 1976 plan"). The plan had gone into effect on January 1, 1976.

Music, however, contended that his pension eligibility should commence on the date he became disabled, in November of 1975, and that the amount of his monthly disability benefits should be computed under the more generous terms of the pension plan in effect at that time (hereinafter "the 1975 plan").3 The effect of the pension plan's five-month "waiting period" eligibility requirement, and thus the question of which benefits Music is entitled to, are the sole issues in this case.4

Section 302 of the Taft-Hartley Act (29 U.S.C. § 186) contains a general prohibition against employers making payments of money "or other things of value" to union representatives. Section 302(c)(5), however, sets forth an exception to this general prohibition for payments made to an employee welfare or pension fund. Under § 302(c)(5), the general prohibition of § 302 does not apply "with respect to money or other things of value paid to a trust fund established ... for the sole and exclusive benefit of the employees of such employer, and their families and dependents...." § 302(c)(5) (emphasis added). Thus, under § 302(c)(5), a pension trust fund must be operated "for the sole and exclusive benefit of the employees." Sailer v. Retirement Fund Trust, 599 F.2d 913, 914 (9th Cir. 1979). Nevertheless, courts generally recognize that the trustees must have broad discretion in fashioning eligibility requirements for pensions, and that judicial intervention is appropriate only where the trustees' actions in fashioning or applying those eligibility requirements do not have a reasonable basis or are arbitrary and capricious. See Ponce v. Construction Laborers Pension Trust, 628 F.2d 537, 541-42 (9th Cir. 1980); Sailer v. Retirement Fund Trust, 599 F.2d at 914. On the other hand, if an employee is "arbitrarily and capriciously" denied a pension, either because the eligibility requirements themselves are unreasonable or because reasonable eligibility requirements are applied in an unreasonable manner, a "structural defect" exists in the pension plan, in violation of § 302.5 See Wilson v. Board of Trustees, 564 F.2d 1299, 1300 (9th Cir. 1977); Lee v. Nesbitt, 453 F.2d 1309, 1311 (9th Cir. 1971); Souza v. Trustees of Western Conference of Teamsters, 460 F. Supp. 843 (N.D.Cal.1978).

THE REASONABLENESS OF THE "WAITING PERIOD" REQUIREMENT

The five-month delay which is the basis of Music's complaint results directly from the pension plan's requirement that an employee be eligible for federal disability benefits in order to qualify for a union disability pension. Similar provisions have been the subject of litigation in this Circuit before.6 The issue framed by Music here, however, is a relatively narrow one.7 Music's sole contention is that his eligibility for a union disability pension should commence on the date he suffered his disabling injury, not five months later. In addition, according to Music, the benefit amount to which he is entitled should be computed under the terms of the pension plan in effect on the date he suffered his disabling injury, not under the terms of the pension plan in effect on the date he qualified for federal disability benefits five months later.

The burden is initially on the plaintiff to show that the eligibility requirement under consideration is unreasonable or is "arbitrary and capricious." Once that showing is made, however, the burden shifts to the trustees of the Trust Fund to come forward with evidence establishing the reasonableness of the eligibility requirement, based on the purposes of the fund. Roark v. Lewis, 401 F.2d 425, 428 (D.C.Cir.1968).

The Trust Fund concedes that "(t)he only date that is important for Plan eligibility purposes is the effective date of qualification for Social Security benefits; the date that applicant suffered his heart attack has no significance under the Plan's eligibility scheme." In our view, Music has carried his initial burden of demonstrating that this is arbitrary and capricious.

One of the major purposes of the disability retirement pension, as evidenced by the terms of the pension plan, is to provide financial benefits for permanently disabled, long term employees who are not yet eligible for other pension benefits, and on whose behalf substantial contributions have been made to the Trust Fund. Each of the other eligibility requirements for a disability pension in both the 1975 and 1976 plans8 is specifically related to that purpose. The five-month waiting period, by contrast, bears no apparent rational relationship to that purpose. It is difficult to see, at least prima facie, how delaying the eligibility of a permanently disabled applicant who satisfies every other eligibility requirement serves any of the purposes of the disability pension set forth above. In our view, where a plan participant satisfies the other eligibility requirements for a disability pension, including the age, length of service, and employer contribution requirements, that participant has a right to receive a disability pension which vests immediately when that participant becomes permanently disabled. It may be that commencement of the benefits to which a disabled participant has earned the right can reasonably be delayed for five months after the date of the disabling injury. Nevertheless, it is the occurrence of the disabling injury which ultimately and fundamentally establishes the participant's right to the disability benefits which are ultimately paid. Prima facie, it seems unreasonable to fix inception of a participant's right to benefits on any date other than the one on which the final event ultimately providing the grounds for a successful claim for benefits has occurred.

The Trust Fund offers three arguments in support of delaying an applicant's eligibility until the five-month waiting period has passed. First, it argues that a five-month waiting period is necessary to confirm that the disability under consideration is permanent. The waiting period thus performs an evidentiary role in the determination of disability it assists in sorting permanent disabilities out from those which are only temporary.9

This argument is not persuasive. The Trust Fund offers no reasons for transforming a waiting period which serves an evidentiary function into an eligibility requirement. Music does not deny that it may be sound medical practice to delay the final determination of permanent disability for some reasonable period after the injury occurs. He argues, rather, that an applicant's eligibility should be retroactive to the date of the disabling injury, the permanence of which is merely confirmed by the waiting period.10 The Trust Fund's argument does not address that issue.

Secondly, the Trust Fund claims that the Trust Fund would incur increased administrative costs if the Trust Fund were not permitted to rely on the five-month waiting period. We are told that the Trust Fund, for example, would be forced to conduct its own investigation into when a worker became injured, into whether subsequent events caused the disability, and into "other matters pertinent to a determination of when the applicant became 'disabled'...." This argument is not convincing. The Trust Fund is presently presupposing that the injury occurring five months earlier, not some later one, caused the disability. As conceded by appellee in its first argument, supra, the Trust Fund presently relies on the five-month waiting period to confirm the permanence of that earlier injury. As noted above, Music concedes that the pension plan can delay determination of the employee's eligibility while the medical determination of the injury's permanence is being made, but insists that eligibility should be retroactive to the date the disabling injury occurred once that determination has been made. The Trust Fund had not explained how making eligibility retroactive to the date the disabling injury occurred would impose any additional administrative burden on them.

Finally, the Trust Fund argues that the plan's reliance on the five-month waiting period "recognizes that most individuals receive temporary disability payments from their health and welfare plans or other insurance during this five-month interim." While the thrust of this argument is not completely clear, the Trust Fund is perhaps contending that delaying payment of disability pension benefits is reasonable because it would enhance the actuarial soundness of the pension plan.11 The Trust Fund might further suggest that such a policy is not at odds with the purpose of the pension plan, since affected workers receive income from other sources during that period.

We do not find this argument persuasive. Music is not arguing that he is entitled to disability benefits for the five-month period immediately following his disabling injury; indeed, Music's counsel made quite clear at oral argument that Music is not seeking any benefits for that five-month period.12 Music is arguing only that his eligibility for benefits should be fixed as of the date of his disabling injury for purposes of determining whether he is covered under the 1975 plan or under the 1976 plan. The Trust Fund's argument does not address that issue.

The Trust Fund has demonstrated no reasonable justification for delaying Music's eligibility for a disability pension for five months after the date of his disabling injury. Music should therefore be deemed eligible for his pension as of November 5, 1975 and his benefits computed under the rate fixed by the 1975 plan.13

REVERSED.