Watershed management authorities created

1. Two or more political subdivisions may create, by chapter 28E agreement, a watershed management authority pursuant to this subchapter. The participating political subdivisions must be located in the same United States geological survey hydrologic unit code 8 watershed. All political subdivisions within a watershed must be notified within thirty days prior to organization of any watershed management authority within the watershed, and provided the opportunity to participate. 2. The chapter 28E agreement shall include a map showing the area and boundaries of the authority. 3. A political subdivision may participate in more than one authority created pursuant to this subchapter. 4. A political subdivision is not required to participate in a watershed management authority or be a party to a chapter 28E agreement under this subchapter. 5. If a portion of a United States geological survey hydrologic unit code 8 watershed is located outside of this state, any political subdivision in such a watershed may participate in any watershed management authority which includes the county in which the political subdivision is located.