Section 144-242-3 - SEASONAL CONVERSION PERMITA.Seasonal conversion permit required: Before converting a seasonal dwelling with a system located in the shoreland zone to a year-round or principal dwelling, a seasonal conversion permit must be obtained from the LPI (as required by 30-A M.R.S.A. §4215(2)).B.Unorganized areas of the State: Seasonal conversion permits for structures within unorganized areas of the State will be issued by the LPI, or the Department in coordination with the Maine Department of Conservation, Land Use Regulation Commission.C.Holding tanks prohibited: A seasonal conversion permit may not be approved if a holding tank is used as a means of waste water disposal or storage. ( 30-A M.R.S.A. §4215(2)).D.Permit for seasonal conversion: The LPI must issue a permit for conversion of a seasonal dwelling to a year-round or principal dwelling if one of the following requirements is met:(1)Existing legal system: A subsurface waste water disposal application, dated after July 1, 1974, exists, showing that the dwelling's system substantially complies with the Maine Subsurface Wastewater Disposal Rules (10-144 CMR 241) in effect at the time of application, and applicable municipal ordinances. The system must have been installed with the required permit and a certificate of approval must have been issued;(2)Legal replacement system: A replacement for an existing onsite wastewater disposal system has been installed, so that it complies with Section C of these Rules and applicable municipal ordinances; or(3)Public sewer available: The dwelling unit's waste water is connected to an approved sanitary sewer system.10-144 C.M.R. ch. 242, § 3