Subject to such regulations as may be prescribed by the proper state supervising authority, banks, trust companies, building and loan associations, insurance companies, finance companies and other lending agencies, the character, extent or incidents of whose loans are subject to the law of this state, are authorized:
Wherever, by statute of this state, collateral is required as security for the deposit of public or other funds, or deposits are required to be made with any public official or department, or any investment of capital or surplus, or a reserve or other fund, is required to be maintained consisting of designated securities, notes or bonds secured by mortgage or trust deed insured by the federal housing administrator, debentures issued by the federal housing administrator, and obligations of national mortgage associations shall be eligible for such purposes.
MCL 487.751