1. The boundary lines of a district may include any incorporated or unincorporated areas. 2. a. The boundary lines of a district shall not be changed after the district is established except as provided in this subsection . b. The boundary lines of a district shall be changed and shall become effective immediately upon approval of the commission and each governmental entity currently participating in the emergency response district. 2008 Acts, ch 1152, §4 ; 2009 Acts, ch 165, §3, 4 ; 2022 Acts, ch 1017, §4