Bonds issued pursuant to Sections 21-5-12 through 21-5-23 N.M. Stat. Ann. shall be in such form and denominations as the board of trustees of the New Mexico school for the visually handicapped [New Mexico school for the blind and visually impaired] shall determine, due and payable not later than twenty years from date of issue. The bonds shall be payable in consecutive order commencing not later than two years from date of issue.