61.1. Clauses respecting the following matters must be common to the collective agreements of each of the sectors:(1) union security, including the advance deduction of union assessments;
(2) union representation;
(3) the procedure for settling grievances;
(4) the exercise of recourses to counter disciplinary measures;
(5) arbitration;
(6) the basic supplemental fringe benefit plan;
(7) any compensation fund considered necessary by the parties to the negotiations in each sector.