“Detriment on grounds related to union membership or activities (1) A worker has the right not to be subjected to any detriment as an individual by any act, or any deliberate failure to act, by his employer if the act or failure takes place for the sole or main purpose of— (a) preventing or deterring him from being or seeking to become a member of an independent trade union, or penalising him for doing so, (b) preventing or deterring him from taking part in the activities of an independent trade union at an appropriate time, or penalising him for doing so … (ba) preventing or deterring him from making use of trade union services at an appropriate time, or penalising him for doing so, or (c) compelling him to be or become a member of any trade union or of a particular trade union or of one of a number of particular trade unions …”
“On a complaint under section 146 it shall be for the employer to show what was the sole or main purpose for which he acted or failed to act.”
“In James v. Eastleigh Borough Council [1990] I.C.R. 554, 575–576, Lord Goff of Chieveley pointed out that if words such as “intention” or “motive” are to be used as a basis for decision they require the most careful handling, and that in some circumstances the concept of “purpose” may be relevant both to intention and motive. I respectfully agree and would add that it is usually dangerous to use “intent” and “purpose” as though they were interchangeable. Accordingly, it seems to me that it is important to adhere strictly to the statutory words. The question becomes: were the recommendation or finding that the applicant should be graded C+ and therefore not passed for promotion and the comment or guidance that to be successful he needed more managerial experience made or given “for the purpose of” deterring him from continuing with his full-time trade union activities?”