(a) This section applies only to an authority in which the principal municipality has a population of more than 1.9 million.
(b) The board of an authority may call an election to determine the voters' will on any issue that the board is authorized to decide under this chapter or on the exercise of any discretionary power of the board under this chapter. At the time the board orders the election, the board shall specify whether the results of the election are binding on the authority.
(c) The board shall specify the ballot proposition for an election called under this section. A ballot proposition is approved if a majority of the voters voting at the election favor the proposition.