Texas Government Code - GOV'T § 1501.254. Ordinance Authorizing and Issuance of Bonds

(a) When the designs, plans, and specifications of the water supply project of the river authority are complete to the extent that they have been approved by the governing bodies of the authority and the municipality, the governing body of the municipality by ordinance may authorize the issuance of revenue bonds in the amount estimated to be sufficient to pay:

(b) The governing body of the municipality may issue the bonds in an amount sufficient to pay:

(c) The ordinance may reserve the right, and specify the conditions under which the right may be exercised, to issue additional revenue bonds on a parity with or subordinate to the original bonds.

(d) The ordinance must provide that all deposits to the credit of the interest and sinking fund, the reserve fund, or another fund must be made from the revenue from the waterworks system of the municipality, or the waterworks and sanitary sewer system of the municipality if those systems are combined.