(a) A district may call an election to approve one or both of the following:
(1) a sales tax; or
(2) an ad valorem tax on property in the district.
(b) A sales tax and an ad valorem tax may be approved at the same election.
(c) Before a district may call the first election under this section, the lead governmental entity by resolution must set:
(1) the date of the election; and
(2) the type and rate of each tax that will appear on the ballot proposition under Section 336.027.