3. (1) This Act applies to all employers in the private sector in Ontario who employ ten or more employees, all employers in the public sector, the employees of employers to whom this Act applies and to their bargaining agents, if any.
(2) If at any time after the coming into force of this Act an employer employs ten or more employees in Ontario, this Act applies with respect to the employer although the number of employees is subsequently reduced to fewer than ten. R.S.O. 1990, c. P.7, s. 3.