(a) The board shall record on its minutes the date the petition is filed and the date it is certified by the clerk.
(b) If the petition contains the required number of signatures and is in proper order, the board shall, at its next regular session after the certification by the clerk, order a referendum to be held at the regular polling place in each election precinct in the political subdivision on the next uniform election date authorized by § 41.001(a), Election Code, that occurs at least 20 days after the date of the order.

(c) The board shall state in the order the proposition to be voted on in the referendum. The order is prima facie evidence of compliance with all provisions necessary to give it validity.