The governing authorities of any municipality entering into an interlocal agreement with a rural water association operating within the corporate limits of the municipality pursuant to Sections 21-25-51 through 21-25-59 may incur bonded and floating indebtedness, including general obligation indebtedness as authorized by Sections 21-33-301 through 21-33-329 and may appropriate funds for the purpose and in the manner prescribed by law without regard to whether the activities and improvements authorized under Section 21-25-51 to be financed by such debt or appropriation are within or without the corporate limits of the municipality. The governing authorities of the municipality may sell, lease, grant or otherwise supply goods and services to the rural water association which is a party to the interlocal agreement or the administrative body or legal entity created to operate the joint or cooperative undertaking.