Wherever State officers, State employees or officers, trustees, members or employees of any department, board, bureau, commission, university, authority, or other unit of State government are required by law, now or hereinafter enacted, to obtain a fidelity or surety bond or bonds to qualify for office, the bonding requirement shall be satisfied by a blanket bond or bonds contracted for as provided in the Illinois Purchasing Act, by the Department of Central Management Services or by a program of self-insurance established by such Department.