In addition to regional planning, the General Assembly has also provided means through which unincorporated communities may adopt unified planning strategies.  T.C.A. §§13-3-201 through 13-3-203.  Any region of less than 10 square miles in area and with more than 500 inhabitants may petition the Department of Economic and Community Development to create a community planning commission, which has all the powers and duties of regional and municipal planning commissions.  T.C.A. §§ 13-3-201, 13-3-202.