Neither lands granted to, or purchased for use and used by the city for park purposes, nor water rights, shall be sold or conveyed without a majority vote of the registered electors at a special or regular municipal election. Nothing in this provision, however, shall prohibit the city from exchanging water rights, or from selling land which was acquired with water rights when such water rights are not sold, without a majority vote of the registered electors. (Ord. No. 87-202, § 40, 11-3-1987; Ord. No. 91-47, § 1, 11-13-1991)