Me. Rev. Stat. tit. 4, § 1614

The securities of the authority are legal investments in which all public officers and public bodies of the State, its political subdivisions, all municipalities and municipal subdivisions, all insurance companies and associations and other persons carrying on an insurance business, all banks, bankers, banking associations, trust companies, savings banks and savings associations, including savings and loan associations, building and loan associations, investment companies and other persons carrying on a banking business, all administrators, guardians, executors, trustees and other fiduciaries and all other persons who are now or may hereafter be authorized to invest in bonds or other obligations of the State, may properly and legally invest funds, including capital, in their control or belonging to them. The securities are also, by this Act, made securities that may properly and legally be deposited with and received by all public officers and bodies of the State or any agency or political subdivision of the State and all municipalities and public corporations for any purpose for which the deposit of securities of bonds or other obligations of the State may be authorized by law.