Under the Railway Labor Act (RLA), a dispute concerning the interpretation or application of a collective bargaining agreement. The RLA requires that minor disputes be resolved in grievance arbitration at an authorized arbitration tribunal. For the railroad industry, these arbitration tribunals are:

In the airline industry, System Boards of Adjustment arbitrate minor disputes.

Minor disputes are distinguishable from three other types of disputes flowing from the RLA:

For more information, see Practice Note, Railway Labor Act: Overview.