Texas Local Government Code - LOC GOV'T § 505.252. Sales Tax

(a) If the authorizing municipality adopts the tax under Section 505.251, a tax is imposed on the receipts from the sale at retail of taxable items within the municipality at the rate approved at the election.

(b) The rate of a tax adopted under this chapter may be any rate that is an increment of one-eighth of one percent, that the authorizing municipality determines is appropriate, and that would not result in a combined rate that exceeds the maximum combined rate prescribed by Section 505.256(a).