Sec. 36.177. BONDS AND NOTES AS INVESTMENTS. District bonds and notes are legal and authorized investments for:(1) banks;(2) savings banks;(3) trust companies;(4) savings and loan associations;(5) insurance companies;(6) fiduciaries;(7) trustees;(8) guardians; and(9) sinking funds of cities, counties, school districts, and other political subdivisions of the state and other public fund