???? ??????? ??????? critical ????? ??? undertakings ??? ????? short. Defines ??? ????????? obligations ??? party ???? relates to ????? ???????, ????????? ????? ???????. Aids ??? ????????? ?? limiting ????????? ??? parties ???????? responsibilities ?? ??? Aids ?? ensuring quality undertakings ?????? ????? ???? ????? ????????? ?????? ???????

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