Canada Industrial Relations Board Regulations, 2012

13.1 (1) Any person who makes a request to intervene in a proceeding must do so

• (a) in the case of an application for certification, within 10 days after receiving notice of the application; or

• (b) in the case of any other application, within 15 days after receiving notice of the application.

(2) A response to a request to intervene must be made within 10 days after a person files a request to intervene.

(3) A request for an extension of time to request to intervene must be made in writing to the Board and set out the grounds for the requested extension.