Section 906 - Short titles of Constitutions of 1874 and 1968(a) Constitution of 1874.--The Constitution of Pennsylvania, as adopted by referendum of December 16, 1873, shall be known and may be cited as the "Constitution of 1874."(b) Constitution of 1968.--The Constitution of Pennsylvania, as amended by referenda of May 17, 1966, November 8, 1966, May 16, 1967 and April 23, 1968 and as numbered by proclamation of the Governor of this Commonwealth of July 7, 1967 pursuant to the act of August 17, 1965 (P.L. 345, No. 180), shall be known and may be cited as the "Constitution of 1968."1972, Dec. 6, No. 290, § 3, imd. effective.