(a) The interest upon such bonds as such interest shall accrue.
(b) The principal of the bonds as the same shall become due.
(c) The necessary charges of the paying agent or paying agents for paying principal and interest of and on such bonds.
(d) Any premium on bonds retired by call or purchase as may be provided therein.
(e) Net revenues shall be defined in the agreement between the board and the participating counties, or other authorized agency.