2 U.S.C. § 4581

(a)

Notwithstanding the provisions of section 4575(d)(1) of this title , and except as otherwise provided in subparagraph (C) of such subsection (d)(1), the aggregate of gross compensation paid employees in the office of a Senator shall not exceed during each fiscal year $1,012,083 if the population of his State is less than 5,000,000.

(b)

Subsection (a) shall take effect October 1, 1991 .