Sixth Circuit -- Bhd. of Locomotive Eng'rs v. United Transp. Union

Where unions have a 'recognized interpretation' of a term of a CBA, an arbitrator ruling on a claim is not bound to observe it unless so instructed by the authorities seeking arbitration.

When the seniority terms of two CBA's conflict, absent contrary restrictions, a mediating board can reinterpret one o the other to find the rule of the common shop.

Bhd. of Locomotive Eng'rs v. United Transp. Union