GENERAL RULES

RULE 86. CHANGING ASSIGNMENTS--ROAD.  Whenever any of the following changes are made in a road assignment it shall be rebulletined as provided in Section (a) of Rule 85, but the engineer holding the assignment at the time the change is made shall have the option of taking the changed assignment or exercising his seniority, notification to be given the crew dispatcher promptly:    

(a) Any change in the mileage of the assignment.  

(b) Any change in the number of days per week the assignment is scheduled to work.  

(c) Any change in the terminal point or points.  

(d) Any change in the established starting time of helper, local or mixed train assignments.