A wage increase is a number. Contract language is the right. Shall, may, and “where practicable” decide postings, overtime, discipline, and whether a grievance has anywhere to go.
Seniority is not a universal rule. It is whatever your book says it controls — postings, layoff, recall, vacation, shifts, sometimes overtime. “I’ve been here longer” is not a veto.
A concession is not “we did not get everything we asked for.” It is giving back something you already had — wages, language, or a two-tier that the next hire will live with.
You do not need to be a labour lawyer. You need to know where the grievance procedure, time limits, seniority, hours, overtime, discipline, and management rights live in your book.
A steward is not a lawyer, a counsellor, or the boss’s messenger. They are the first union person most members ever talk to — and the work is specific.