Notwithstanding any other provision of law, all notes and bonds hereafter sold and delivered pursuant to the provisions of this article are legal investments for all trust funds and for the funds of all insurance companies, banks, both commercial and savings, trust companies, and the state school funds, and may also be used as security for the deposit of public moneys in banks in this state. Such bonds are also legal investments for any public or private funds which may be invested in county, municipal or school district bonds, and may be deposited as security for the performance of any act whenever the bonds of any county, municipality or school district may be so deposited.