(a) The commission shall establish a time schedule by which each planning region existing on September 1, 1989, shall develop a regional solid waste management plan, and local governments located in those planning regions shall develop local solid waste management plans as required by this section.
(b) The time schedule shall be based on the availability of funds to provide financial assistance to planning regions and local governments as prescribed by Sections 363.091 through 363.093 for the development of those plans.

(c) Unless otherwise required by federal law or federal regulations, a planning region or local government is not required to develop a solid waste management plan until after the date on which funds are provided to that planning region or local government by the commission as prescribed by Sections 363.091 through 363.093 for the development of plans.
(d) Each planning region existing on September 1, 1989, shall develop a regional solid waste management plan, and local governments located in that planning region shall develop local solid waste management plans in accordance with the time schedule established by the commission and as provided by this subchapter.