(a) The State Water Implementation Revenue Fund for Texas is created as a special fund in the state treasury outside the general revenue fund. Money in the State Water Implementation Revenue Fund for Texas shall be administered, without further appropriation, by the Texas Water Development Board or that board’s successor in function and shall be used for the purpose of implementing the state water plan that is adopted as required by general law by the Texas Water Development Board or that board’s successor in function. Separate accounts may be established in the State Water Implementation Revenue Fund for Texas as necessary to administer the fund or authorized projects.
(b) The legislature by general law may authorize the Texas Water Development Board or that board’s successor in function to issue bonds and enter into related credit agreements that are payable from all revenues available to the State Water Implementation Revenue Fund for Texas.

(c) The Texas Water Development Board or that board’s successor in function shall provide written notice to the Legislative Budget Board or that board’s successor in function before issuing a bond pursuant to this section or entering into a related credit agreement that is payable from revenue deposited to the credit of the State Water Implementation Revenue Fund for Texas and shall provide a copy of the proposed bond or agreement to the Legislative Budget Board or that board’s successor in function for approval. The proposed bond or agreement shall be considered to be approved unless the Legislative Budget Board or that board’s successor in function issues a written disapproval not later than the 21st day after the date on which the staff of that board receives the submission.
(d) The State Water Implementation Revenue Fund for Texas consists of:
(1) money transferred or deposited to the credit of the fund by general law, including money from any source transferred or deposited to the credit of the fund at the discretion of the Texas Water Development Board or that board’s successor in function as authorized by general law;
(2) the proceeds of any fee or tax imposed by this state that by statute is dedicated for deposit to the credit of the fund;
(3) any other revenue that the legislature by statute dedicates for deposit to the credit of the fund;
(4) investment earnings and interest earned on amounts credited to the fund;
(5) the proceeds from the sale of bonds, including revenue bonds issued under this section by the Texas Water Development Board or that board’s successor in function for the purpose of providing money for the fund; and
(6) money disbursed to the fund from the State Water Implementation Fund for Texas as authorized by general law.
(e) The legislature by general law shall provide for the manner in which the assets of the State Water Implementation Revenue Fund for Texas may be used, subject to the limitations provided by this section. The legislature by general law may provide for costs of investment of the State Water Implementation Revenue Fund for Texas to be paid from that fund.
(f) In each fiscal year in which amounts become due under the bonds or agreements authorized by this section, the Texas Water Development Board or that board’s successor in function shall transfer from revenue deposited to the credit of the State Water Implementation Revenue Fund for Texas in that fiscal year an amount that is sufficient to pay:
(1) the principal of and interest on the bonds that mature or become due during the fiscal year; and
(2) any cost related to the bonds, including payments under related credit agreements that become due during that fiscal year.
(g) Any obligations authorized by general law to be issued by the Texas Water Development Board or that board’s successor in function pursuant to this section shall be special obligations payable solely from amounts in the State Water Implementation Revenue Fund for Texas. Obligations issued by the Texas Water Development Board or that board’s successor in function pursuant to this section may not be a constitutional state debt payable from the general revenue of the state.
(h) Any dedication or appropriation of revenue to the credit of the State Water Implementation Revenue Fund for Texas may not be modified so as to impair any outstanding bonds secured by a pledge of that revenue unless provisions have been made for a full discharge of those bonds.
(i) Money in the State Water Implementation Revenue Fund for Texas is dedicated by this constitution for purposes of § 22, Article VIII, of this constitution.
(j) This section being intended only to establish a basic framework and not to be a comprehensive treatment of the State Water Implementation Revenue Fund for Texas, there is hereby reposed in the legislature full power to implement and effectuate the design and objects of this section, including the power to delegate such duties, responsibilities, functions, and authority to the Texas Water Development Board or that board’s successor in function as the legislature believes necessary.