???? ??????? ??????? essential ????? ??? undertakings ??? ????? short. ???? ??? ????????? obligations ??? ??? ???? ????? maintenance ???????, and details ????? ???????. Aids ??? ????????? ?? minimizing disputes ??? ??????? making clear ???????? ?? party ?????? ?? guaranteeing ???? projects ????

????? ??????? ???????? ?? ???? ??????? ???????? ????. ????? ??? ??????? ?????? ????? ???? ??? ????? ?????? ? ????? ?????????. ????? ???? ??? ??????????? ???????? ?? ???????? ????? ?????? ????? ??????? ???????? ?????? ??????? ????? ?? ??????? ?? ??? ??? ??????. ????? ?? ???????? ???? ?????