(With apologies to all disinterested colleagues for being such a pain on this issue:)
"If we were certified, could we be forced to honour picket lines of other unions?
No. The decision to cross or not to cross a picket line is a matter of individual conscience, and no organization, unionized or not, has any ability to compel an individual to decide one way or other."
BCGEU
A member commits a breach of duty when they ...
(f) cross a picket line of the BCGEU or another union;
... If the charges are sustained, the hearing panel may impose a penalty that fits with the breach of duty, ... A penalty could include temporarily suspending or ending the respondent’s membership, imposing terms of membership, placing conditions on the member’s ability to hold office, fine, or some other form of discipline.
CUPE
If the accused is found guilty, the Trial Committee will decide any penalty and what, if anything, the accused must do or not do. The decision may include:
(i) a reprimand
(ii) a fine
(iii) a suspension or expulsion from membership
(iv) a ban against holding membership or office
(v) an order to stop doing the act or acts
complained of
(vi) an order to correct the act or acts complained
of
(vii) any other order that the Trial Committee finds
appropriate.
BCTF
1. determine appropriate publication of the finding of such breach;
2. issue a warning to the member;
3. issue a reprimand to the member;
4. impose a monetary fine on the member;
...
7. suspend the right of the member to hold office or
membership in, or receive specified benefits from, the BCTF and/or
any subsidiary bodies for a specific period of time;
8. expel from membership in the local and BCTF.