What takes precedence the national or your supplement? In our supplement, three consecutive over 9.5 days allows for a grievance. I didn't see any criteria that needed to be met other than the three straight days.
Article 2 Section 2 of the National Master
Section 2. Riders
Present Supplements, Riders and Addenda shall remain in effect.
Any new Supplement, Rider or Addendum, or changes to
Supplements, Riders or Addenda or in the contract affiliation of any
Local Union covered by this Agreement must be submitted to the
Joint National Negotiating Committee for review and approval.
Failure to be approved by the Committee shall render said
Supplement, Rider or Addendum null and void.
Any lesser conditions contained in any Supplement, Rider or
Addendum shall be superseded by the conditions contained in this
Master Agreement.
However, except where specifically stated otherwise
in the Master Agreement, nothing in this Master Agreement
shall deprive any employee of any superior benefit contained in
their Supplement, Rider or Addendum.