Upon completion and approval of all on-site and off-site improvements including, but not being necessarily limited thereto, utilities, roads, curbing, gutters, sidewalks, paved areas and all appurtenances, whether or not dedicated and accepted by the Township, and upon the posting of a maintenance bond or bonds in sufficient amounts and for a term of not less than two years and subject to the approval of the Township Attorney and which provide therein for the proper maintenance, care and repair of such improvements, the performance bond or bonds shall be released.