Subject to clause 17.5 and section 215 of the FPSLRA, the association may bring a class action before the Board on behalf of bargaining unit workers who feel aggrieved by the interpretation or application of a provision of the collective agreement or an arbitration award in respect of those workers. 55.1 The NRC Staff Adaptation Directive is part of this collective agreement and is reviewed and negotiated by the signatories to the Directive in accordance with the conditions described in the Directive. 46.4 If a staff member is invited by an authorized officer of the Council to travel on his or her rest days or on a particular holiday to attend a course, conference or seminar, the provisions of paragraph 46.1 shall apply. 1978, subject to the Federal Public Sector Labour Relations Act (LSLPF) and all Acts (of Parliament) that have been or may be, as the case may be, defined under an Act provided for in section 113(b) of the FPSLRA . . .