It touches on issues of the union's right to the personal information of members of a bargaining unit it represents, regardless if that employee was actually a member of the union. (zeilikmanlaw.com)
For example, confidentiality can not be assured when using an employee's workplace contact information, and it is sometimes necessary for a union to communicate with members of the bargaining unit in confidence. (labourandemploymentlaw.com)
According to the Supreme Court of Canada, this may require employers to disclose information that will allow a certified union to contact members of its bargaining unit at home. (labourandemploymentlaw.com)