Tex. Local Government Code § 377.072

(a) A district shall establish by resolution a fund known as the development project fund. The district may establish separate accounts within the fund.

(b) The district shall deposit into the development project fund:

(1) the proceeds from any sales and use tax imposed by the district;

(2) all revenue from the sale of bonds or other obligations by the district; and

(3) any other money required by law to be deposited in the fund.

(c) Except as provided by Subsections (d) and (e), the district may use money in the development project fund only to:

(1) pay the costs of planning, acquiring, establishing, developing, constructing, or renovating one or more development projects located:

(A) in the district; or

(B) outside the district, if:

(i) the project is located in the extraterritorial jurisdiction of the municipality that created the district;

(ii) the board determines that the development project will provide an economic benefit to the district; and

(iii) the following entities, as applicable, by resolution approve the development project:

(a) the municipality that created the district; and

(b) each municipality in whose corporate limits or extraterritorial jurisdiction the project is located;

(2) pay the principal of, interest on, and other costs relating to bonds or other obligations issued by the district or to refund bonds or other obligations; or

(3) pay the costs of operating or maintaining one or more development projects during the planning, acquisition, establishment, development, construction, or renovation or while bonds or other obligations for the planning, acquisition, establishment, development, construction, or renovation are outstanding.

(d) A district located in a county with a population of 3.3 million or more may use money in the development project fund only to:

(1) pay the costs of planning, acquiring, establishing, developing, constructing, or renovating one or more development projects beneficial to the district if the projects are in the district boundaries or the extraterritorial jurisdiction of the municipality where the district is located;

(2) pay the principal of, interest on, and other costs relating to bonds or other obligations issued by the district or to refund bonds or other obligations; or

(3) pay the costs of operating or maintaining one or more development projects during the planning, acquisition, establishment, development, construction, or renovation or while bonds or other obligations for the planning, acquisition, establishment, development, construction, or renovation are outstanding.

(e) A district that is located in a municipality with a population of more than 5,000 and less than 6,000 and that is located wholly in a county with a population of more than 20,000 and less than 25,000 and that borders the Brazos River may use money in the development project fund only to:

(1) pay the costs of planning, acquiring, establishing, developing, constructing, or renovating one or more development projects inside the county in which the district is located, if the project:

(A) accomplishes a public purpose of the district;

(B) allows the district to retain control over the money to ensure that the district's public purpose is accomplished and to protect the district's investment; and

(C) benefits the district;

(2) pay the principal of, interest on, and other costs relating to bonds or other obligations issued by the district or to refund bonds or other obligations; or

(3) pay the costs of operating or maintaining one or more development projects during the planning, acquisition, establishment, development, construction, or renovation or while bonds or other obligations for the planning, acquisition, establishment, development, construction, or renovation are outstanding.