An Act amending the act of June 22, 1931 (P. L. 844, No. 274), entitled, as amended, "An act authorizing the Commonwealth of Pennsylvania, or any department or division thereof, and counties, cities, boroughs, incorporated towns, townships, school districts, vocational school districts, and institution districts to make contracts of life, health, hospitalization medical services, ***" clarifying provisions relating to State annuitants and including vestees.