Method 1:
One indirect method is to stand there and watch them until they are done. If they ask you .... "what are you doing?"......tell them that you are doing their job since they are doing yours.
Method 2: File a grievance.
Section 7 (d) – Supervisors Working
(d) If it is determined at any step of the grievance and/or arbitration
procedure that this Section, or a “supervisor working” provision
in a Supplement, Rider or Addendum, has been violated, the
aggrieved employee will be paid as follows: (i) if the actual hours
worked by the supervisor amounts to two (2) hours or less, the
aggrieved employee will be paid for the actual hours worked by
the supervisor at the rate of double time the employee’s rate of
pay at the time of the incident; or (ii) if the supervisor works more
than two (2) hours, the aggrieved employee shall be paid four (4)
hours at straight time or actual hours worked at double time the
employee’s rate of pay at the time of the incident, whichever is
greater. If no aggrieved employee can be identified, the payment
will be made to the grievant. Such remedy shall be in addition
to any other remedies sought by the Union in the appropriate
grievance procedure.
If a Supplement, Rider or Addendum does not have a provision
requiring notice to the steward when a supervisor works the following
shall be incorporated: “In the event a supervisor does perform
bargaining unit work, the Employer shall notify the appropriate shop
steward as soon as possible.”
In the event that any individual supervisor is found to be in violation
of the first paragraph of this Subsection three (3) times in any nine
(9) month rolling period, the grievance shall be paid at triple time the
employee’s rate of pay for the hours specified in the first paragraph