benefit plan (other than a multiemployer plan) to an employer— (1) a trust which is part of such plan shall not be treated as failing to meet the requirements of section 401(a) or any other provision of law solely by reason of such transfer (or any other action authorized under this section), and (2) such transfer shall not be treated as a prohibited transaction for purposes of section 4975. The gross income of the employer shall include the amount of any qualified transfer made during the taxable year. (b) Qualified transfer For purposes of this section— (1) In general The term qualified transfer means a transfer— (A) of excess pension assets of a defined benefit plan to the employer, and (B) with respect to which the vesting requirements of subsection (c) are met in connection with the plan. (2) Only 1 transfer per year No more than 1 transfer with respect to any plan during a taxable year may be treated as a qualified transfer for purposes of this section. (c) Vesting requirements of plans transferring assets The vesting requirements of this subsection are met if the plan provides that the accrued pension benefits of any participant or beneficiary under the plan become nonforfeitable in the same manner which would be required if the plan had terminated immediately before the qualified transfer (or in the case of a participant who separated during the 1-year period ending on the date of the transfer, immediately before such separation). (d) Definition and special rule For purposes of this section— (1) Excess pension assets The term excess pension assets means the excess (if any) of— (A) the lesser of— (i) the fair market value of the plan's assets (reduced by the prefunding balance and funding standard carryover balance determined under section 430(f)), or (ii) the value of plan assets as determined under section 430(g)(3) after reduction under section 430(f), over (B) 125 percent of the sum of the funding target and the target normal cost determined under section 430 for such plan year. (2) Coordination with