; and (B) consistent with the requirements of paragraph (2) of this subsection. Unless the Commission determines that the proposed preferential classification, rate, or fee must be disapproved, the Commission shall also provide an estimate of the monetary value of the approved preference for each year for which the preference is to be effective. (5) Within 90 days of receiving a request under paragraph (3), Commission shall issue a decision which approves, approves with modifications, or disapproves the proposed classification, rate, or fee. The Secretary shall ensure that each treaty, convention, or amendment concluded under this section is consistent with the decision of the Commission. (6) The Commission shall periodically determine the difference between the revenues received by the Postal Service pursuant to preferential classifications, rates, or fees approved under this subsection and the revenues that the Postal Service would have received in the absence of such classifications, rates, or fees. Such estimates shall be included in the annual report provided by the Commission under section 3651(b). (7) Within 3 months after the end of each Government fiscal year, the Secretary shall transfer to the Postal Service the revenues foregone due to such preferential rates, fees, or classifications in the previous fiscal year, as determined by the Commission, from funds appropriated to the Department of State for that purpose. (8) Within 120 days from the enactment of this section, the Commission shall promulgate (and may thereafter revise) such regulations as it deems necessary and proper to implement this subsection. In promulgating such regulations, the Commission shall take account of, but not be bound by the definitions of terms and other standards of the Universal Postal Union. . 4. Effect on international postal agreements (a) In general In the implementation of paragraph 407(b)(1) of title 39, United States Code, as amended by section 1, the Secretary of State may not conclude, approve, or otherwise agree