(a) A political subdivision may not propose a measure, including a charter amendment, that will appear on the same ballot as a petition-initiated measure if:
(1) the two measures generally address the same subject matter; or
(2) a provision of a proposed measure would invalidate or conflict with any portion of a petition-initiated measure.
(b) A measure proposed by a political subdivision in violation of this section is void if the measure is proposed not earlier than the 180th day before the date the political subdivision's secretary receives the petition under this chapter. A political subdivision may be enjoined from proposing the measure.