Section 144-242-1 - DEFINITIONSA.Department: The Department of Health & Human Services, Maine Center for Disease Control and Prevention, Division of Environmental Health.B.Design Flow: The volume of wastewater upon which subsurface wastewater disposal systems are sized, expressed in gallons per day or gpd.C. DisposalSystems: Subsurface wastewater disposal systems, as defined in 30-A M.R.S.A. §4201(5).D.LPI: Local Plumbing Inspector.E.Principal dwelling or year-round residence: A dwelling that existed on December 31, 1981, and that was used as a principal or year-round residence during the period from 1977 to 1981. Evidence of use as principal or year round residence includes, but is not limited to, (i) the listing of that residence as an occupant's legal residence for the purpose of either voting, filing a state tax return, or automobile registration; or (ii) occupancy of that dwelling for a period exceeding 7 months in any calendar year. ( 30-A M.R.S.A §4201).F.Rules: Rules for Conversion of Seasonal Dwelling Units into Year-round Residences in the Shoreland Zone (CMR, Chapter 242).G.Seasonal dwelling: A dwelling that existed on December 31, 1981, and which was not used as a principal or year-round residence during the period from 1977 to 1981. ( 30-A M.R.S.A. §4201).H.Shoreland Zone: The shoreland zone of major waterbodies/courses (as defined in 38M.R.S.A. §435).10-144 C.M.R. ch. 242, § 1