(a) An authority may issue bonds at any time and for any amounts it considers necessary or appropriate for the acquisition, construction, repair, equipping, improvement, or extension of its transit authority system.
(b) The board, by resolution, may authorize the issuance of bonds payable solely from revenue.
(c) Bonds, any portion of which is payable from taxes, may not be issued until authorized by a majority of the votes received in an election ordered and held for that purpose.