 When the seat was vacated the president pro tempore became acting lieutenant governor in accordance with the constitution, and on two occasions the president pro tempore became governor.In 1976 with implementation of the Louisiana Constitution of 1974 the lieutenant governor assumed executive duties and the gavel once again passed to a senate elected President.The reinstatement of the elected senate presidency and the installation of a new constitution brought with it something Louisiana had not seen since the 1850s; a two-party system.