Any ordinance or order authorizing the issuance of bonds hereunder, or any trust indenture with any banking institution or trust company within or without the state for the security of said bonds, which any such municipality or county commission is hereby empowered and authorized to enter into and execute, may contain covenants with the holders of such bonds as to:

(a) The purpose or purposes to which the proceeds of sale of such bonds or the revenues derived from said waterworks or electric power system may be applied and the securing, use and disposition thereof, including, if deemed desirable, the appointment of a trustee or depository for any of such funds;

(b) The pledging of all or any part of the revenues derived from the ownership, control or operation of such waterworks or electric power system, including any part thereof heretofore or hereafter acquired, constructed, established, extended or equipped or derived from any other sources, to the payment of the principal of or interest thereon of bonds issued hereunder and for such reserve or other funds as may be considered necessary or desirable;

(c) The fixing, establishing and collecting of such rates or charges for the use of the services and facilities of the waterworks or electric power system, including the parts thereof heretofore or hereafter acquired, constructed, established, extended or equipped and the revision of same from time to time, as will always provide revenues at least sufficient to provide for all expenses of repair, maintenance and operation of such waterworks or electric power system, the payment of the principal of and interest upon all bonds or other obligations payable from the revenues of such waterworks or electric power system, and all reserve and other funds required by the terms of the ordinance or order authorizing the issuance of such bonds;

(d) The transfer from the General Funds of the municipality or county commission to the account or accounts of the waterworks or electric power system of an amount equal to the cost of furnishing the municipality or county commission or any of its departments, boards or agencies or the county commission with the services and facilities of such waterworks or electric power system;

(e) Subject to the provisions of subsection (b), section twelve of this article, limitations or restrictions upon the issuance of additional bonds or other obligations payable from the revenues of such waterworks or electric power system, and the rank or priority, as to lien and source and security for payment from the revenues of such waterworks or electric power system, between bonds payable from such revenues;

(f) The manner and terms upon which all bonds and other obligations issued hereunder may be declared immediately due and payable upon the happening of a default in the payment of the principal of or interest thereon, or in the performance of any covenant or agreement with bondholders, and the manner and terms upon which such defaults may be declared cured and the acceleration of the maturity of such bonds rescinded and repealed;

(g) Budgets for the annual repair, maintenance and operation of such waterworks or electric power system and restrictions and limitations upon expenditures for such purposes, and the manner of adoption, modification, repeal or amendment thereof, including the approval of such budgets by consulting engineers designated by holders of bonds issued hereunder;

(h) The amounts of insurance to be maintained upon such waterworks or electric power system, or any part thereof, and the use and disposition of the proceeds of any insurance; and

(i) The keeping of books of account, relating to such undertakings and the audit and inspection thereof, and the furnishing to the holders of bonds issued hereunder or their representatives, reports prepared, certified or approved by accountants designated or approved by the holders of bonds issued hereunder.

Any such ordinance, order or trust indenture may also contain such other additional covenants as shall be considered necessary or desirable for the security of the holders of bonds issued hereunder, notwithstanding that such other covenants are not expressly enumerated above, it being the intention hereof to grant to municipalities or county commissions plenary power and authority to make any and all covenants or agreements necessary in order to secure greater marketability for bonds issued hereunder as fully and to the same extent as such covenants or agreements could be made by a private corporation rendering similar services and facilities and to grant to municipalities and counties full and complete power and authority to enter into any contracts, covenants or agreements with holders of bonds issued hereunder not inconsistent with the Constitution of this state.