Section, Pub. L. 89-545, Sec. 101, Aug. 27, 1966, 80 Stat. 356, provided, effective fiscal year 1967 and thereafter, for stationery allowance of $3,000 per annum for Senators from States having population of 10 million or more inhabitants. See amendment by Pub. L. 90-21 to section 46a of this title providing such an allowance to all Senators effective fiscal year 1967 and thereafter