The amount of an assessment under clause (i) shall be equal to the product obtained by multiplying the amount of the representative’s fee that would be required to be paid by subparagraph (B) before the application of this subparagraph, by the percentage specified in subclause (II), except that the maximum amount of the assessment may not exceed $75. In the case of any calendar year beginning after the amendments made by section 302 of the Social Security Protection Act of 2003 3 3 See References in Text note below. take effect, the dollar amount specified in the preceding sentence (including a previously adjusted amount) shall be adjusted annually under the procedures used to adjust benefit amounts under section 415(i)(2)(A)(ii) of this title , except such adjustment shall be based on the higher of $75 or the previously adjusted amount that would have been in effect for December of the preceding year, but for the rounding of such amount pursuant to the following sentence. Any amount so adjusted that is not a multiple of $1 shall be rounded to the next lowest multiple of $1, but in no case less than $75.

The percentage specified in this subclause is such percentage rate as the Commissioner determines is necessary in order to achieve full recovery of the costs of determining and approving fees to attorneys from the past-due benefits of claimants, but not in excess of 6.3 percent.