59. From the filing of a petition for certification and until the right to lock out or to strike is exercised or an arbitration award is handed down, no employer may change the conditions of employment of his employees without the written consent of each petitioning association and, where such is the case, certified association.
The same rule applies on the expiration of the collective agreement until the right to lock out or to strike is exercised or an arbitration award is handed down.
The parties may stipulate in a collective agreement that the conditions of employment contained therein shall continue to apply until a new agreement is signed.
R. S. 1964, c. 141, s. 47; 1969, c. 47, s. 28; 1977, c. 41, s. 37; 1994, c. 6, s. 12.