To effect such a merger, a petition to merge shall be filed with the board of the merger district by the commissioners of the merging district. The commissioners of the merging district may sign and file the petition on their own initiative, and they shall file a petition when it is signed by ten percent of the registered voters resident in the merging district who voted in the last general municipal election and presented to the board of commissioners. The petition shall state the reasons for the merger, state the terms and conditions under which the merger is proposed, and request the merger.