(a) This subpart allocates additional rate authority to provide the Postal Service with revenue for remittance towards the statutorily mandated amortization payments for supplemental and unfunded liabilities identified in § 3030.182. As described in § 3030.184, for retirement obligation rate authority to be made available, the Postal Service must annually remit towards these amortization payments all revenue collected under this subpart previously. The full retirement obligation rate authority, calculated as described in § 3030.183, shall be phased in over 5 fiscal years, taking into account changes in volume during the phase-in period. If combined with an equal rate increase on Competitive products, the compounded rate increase resulting from retirement obligation rate authority is calculated to generate sufficient additional revenue at the end of the phase-in period to permit the Postal Service to remit the entire invoiced amount of its amortization payments.

(b) Until the conclusion of the phase-in period, the Postal Service shall file a notice with the Commission by December 31 of each year that calculates the amount of retirement obligation rate authority that is eligible to be authorized under this subpart.

(c) The Commission shall review the Postal Service's notice and determine how much, if any, rate authority will be authorized under this subpart. Any rate authority allocated under this subpart:

(1) Shall be made available to the Postal Service as of the date of the Commission's determination;

(2) Must be included in the calculation of the maximum rate adjustment authority in the first generally applicable rate adjustment filed after the Commission's determination;

(3) Shall lapse if not used in the first generally applicable rate adjustment filed after the Commission's determination;

(4) Shall lapse if unused, within 12 months of the Commission's determination, however this paragraph (c)(4) shall not prohibit the Postal Service from making a stand-alone adjustment to one or two generally applicable rate cells, if such a case were to be followed by a broader rate adjustment in the class later in the same fiscal year; and

(5) May not be used to generate unused rate authority, nor shall it affect existing banked rate authority.