(a) A local government, as defined by Section 271.081, may use the reverse auction procedure, as defined by Section 2155.062(d), Government Code, in purchasing goods and services in place of any other method of purchasing that would otherwise apply to the purchase.
(b) A local government that uses the reverse auction procedure must include in the procedure a notice provision and other provisions necessary to produce a method of purchasing that is advantageous to the local government and fair to vendors.