Tex. Loc. Gov't Code § 111.0705

If a county bond issue is submitted at an election or other authorized obligations are to be issued against future revenues and a tax is to be levied for those obligations, the commissioners court shall adopt a budget of proposed expenditures. On receipt of the proceeds of the sale of the bonds or other obligations, the county may make expenditures from the proceeds in the manner provided by this subchapter for expenditures for general purposes.