Where the parties fail to agree as to the total number of members who represent the workers on a committee, the number is as follows:(1) 2, where the establishment in which the committee was established employs 50 workers or less, except where the establishment includes a group of workers not represented by a certified association that has appointed a committee member in accordance with section 13, in which case the number is brought from 2 to 3;
(2) 3, where the establishment in which the committee was established employs from 51 to 150 workers;
(3) 5, where the establishment in which the committee was established employs from 151 to 500 workers;
(4) 7, where the establishment in which the committee was established employs from 501 to 1,000 workers;
(5) 9, where the establishment in which the committee was established employs from 1,001 to 1,500 workers;
(6) 11, where the establishment in which the committee was established employs more than 1,500 workers.