New York Laws
Article 2 - Limitations of Time
217 - Proceeding Against Body or Officer; Actions Complaining About Conduct That Would Constitute a Union's Breach of Its Duty of Fair Representation; Four

(b) Any action or proceeding by an employee or former employee against
an employer subject to article fourteen of the civil service law or
article twenty of the labor law, an essential element of which is that
an employee organization breached its duty of fair representation to the
person making the complaint, shall be commenced within four months of
the date the employee or former employee knew or should have known that
the breach has occurred, or within four months of the date the employee
or former employee suffers actual harm, whichever is later.

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