Union Grievance alleging violation of a supplementary agreement concerning shift rotation.
The Facts:
With the implementation of the collective agreement of 1968, which preceded the present agreement, the company introduced in the shipping department a system which involved some rotation of shifts. That system is no longer in effect, and there is some uncertainty just when it ceased. It is agreed, however, that early in 1970 the company lost a major customer. That customer was last served on Saturday, February 28th, and a substantial lay-off followed immediately. On Sun-day, March 8th, the company\u27s employees went on a legal strike, and returned to work on April 5th. Probably since February 28th, and certainly since the strike, the company has not operated a system of shift rotation
