17. A person shall forfeit his qualification as a member of the commission when he:
(a) no longer resides in the region;
(b) is convicted of an infringement of this Act or of the Criminal Code (Revised Statutes of Canada, 1985, chapter C-46);
(c) authorizes an expenditure not provided for in the budget of the commission;
(d) no longer represents the employers or the employees, as the case may be, within the advisory committee which appointed him.