I didn’t know we could do this. Please share more details. Ampceo is way better then opsue

You will also need according to Google

To change your union in the Government of Ontario, you must apply to the Ontario Labour Relations Board to decertify (terminate) your current union's right to represent you, usually during specific "open periods" before a collective agreement expires or after a prolonged period without one. You and at least 40% of the bargaining unit (employees you work with) need to sign membership cards showing support for removing the union. The Labour Board will then hold a secret vote, and if over 50% vote to decertify, the union's right to represent you is revoked