(A) Notwithstanding paragraph (3), if the Commissioner of Social Security determines that reliable information is currently available with respect to the income and other circumstances of an individual for a month (including information with respect to a class of which such individual is a member and information with respect to scheduled cost-of-living adjustments under other benefit programs), the benefit amount of such individual under this subchapter for such month may be determined on the basis of such information.

(B) The Commissioner of Social Security shall prescribe by regulation the circumstances in which information with respect to an event may be taken into account pursuant to subparagraph (A) in determining benefit amounts under this subchapter.