(a) The procedures provided by Section 452.701(a) or (b) and Sections 452.703-452.708 apply to the addition to an authority of a municipality located in another subregion or the addition of another subregion.
(b) After an election as provided by Section 452.715(a), a subregional board shall be appointed under Subchapter N or O, as applicable, and the executive committee existing before the additional subregional board is appointed shall be modified to conform with Subchapter K.