The commission may establish an emergency municipal, tribal, and rural water assistance program for municipalities, tribes, and rural water systems, whose primary source of water is the Missouri River, Lake Sakakawea, or Lake Oahe. The commission may establish procedures, cost-share guidelines, and other criteria for municipalities, tribes, and rural water systems that request emergency assistance due to low water conditions on the Missouri River, Lake Sakakawea, or Lake Oahe. The purpose of this program is to provide emergency grant funds to municipalities, tribes, and rural water systems facing a critical need or health risk as a result of the inability of the water intake system for the municipal, tribal, or rural water system to supply an adequate quantity of quality water to the people served by the municipal, tribal, or rural water system.