(a) Basic Benefit.—
(b) Reduced and Enhanced Benefits.—Under the regulations prescribed by the Secretary, a person enrolled for coverage under the insurance program may elect—
(c) Amount for Partial Month.—
(d) Adjustment of Amounts.—
The Secretary shall determine annually the effect of inflation on benefits and shall adjust the amounts set forth in subsections (a) and (b)(2) to maintain the constant dollar value of the benefit.