RULE 87. SENIORITY ROSTERS. (a) Seniority rosters showing name and seniority date will be maintained for each seniority district.

Seniority rosters will be, brought up to date and posted annually at a place accessible to all employes affected, and copy furnished Local and General Chairmen. General Chairman will be advised monthly of names of employes added to or removed from rosters between posting periods and, in case of employes removed, will be advised cause.

(b) Seniority rosters will, prior to posting, be officially approved by the General Chairman and the General Manager.