45.1. The employer shall give the association of employees concerned a notice indicating the date on which he intends to alienate or transfer the operation of all or any part of his undertaking. The association has 90 days after the date of receipt of the notice to apply to the Commission for a determination as to the application of section 45.
In the absence of such a notice, the time prescribed for filing such an application is 270 days from knowledge of the fact that the undertaking has been alienated or that the operation of all or a part of the undertaking has been transferred.