Sch A1 para 148
(1) This paragraph applies if as a result of a declaration by the CAC another union is (or other unions are) recognised as entitled to conduct collective bargaining on behalf of a group of workers at least one of whom falls within the bargaining unit. (2) The CAC must issue a declaration that the bargaining arrangements are to cease to have effect on a date specified by the CAC in the declaration. (3) If a declaration is issued under sub-paragraph (2) the bargaining arrangements shall cease to have effect accordingly. (4) It is for the CAC to decide whether sub-paragraph (1) is fulfilled, but in deciding the CAC may take account of the views of any person it believes has an interest in the matter.