Bonds issued by a municipality under authority of the Pollution Control Revenue Bond Act shall not be the general obligation of the municipality within the meaning of Article 9, Sections 12 and 13 of the constitution of New Mexico. The bonds shall be payable solely out of the revenue derived from the project or from the sale or lease of the project to finance which the bonds are issued. Bonds and interest coupons issued under authority of the Pollution Control Revenue Bond Act shall never constitute an indebtedness of the municipality within the meaning of any state constitutional provision or statutory limitation and shall never constitute nor give rise to a pecuniary liability of the municipality or a charge against its general credit or taxing powers, and such fact shall be plainly stated on the face of each bond. The bonds may be executed and delivered at any time and from time to time, may be in such form and denominations, may be of such tenor, may be in registered or bearer form either as to principal or interest or both, may be payable in such installments and at such time or times not exceeding thirty years from their date, may be payable at such place or places, may bear interest payable at such place or places and evidenced in such manner and may contain such provisions not inconsistent with the Pollution Control Revenue Bond Act, all as shall be provided in the ordinance and proceedings of the governing body whereunder the bonds shall be authorized to be issued. Said bonds may bear interest at such rate or rates as shall be provided, or determined in the manner provided, in said ordinance and proceedings. Any bonds issued under the authority of the Pollution Control Revenue Bond Act may be sold at public or private sale in such manner and from time to time as may be determined by the governing body to be most advantageous, and the municipality may pay all expenses, attorneys’, engineering and architects’ fees and premiums and commissions which the governing body may deem necessary or advantageous in connection with the authorization, sale and issuance of the bonds. All bonds issued under the authority of the Pollution Control Revenue Bond Act and all interest coupons applicable to the bonds shall be construed to be negotiable.