Section 3 (a) Any employee who is called or reports as scheduled, unless advised not to report, shall be guaranteed a minimum of eight (8) hours’ work or pay. (b) All employees required to report for work on the sixth (6th) report in a payroll period shall be guaranteed a minimum of eight (8) hours’ work at their applicable premium rate of time and one half (1 1/2). All full-time seniority employees hired after July 31, 1987, on their sixth (6th) and seventh (7th) report in a payroll peri...
I know I'm quoting myself here, but I couldn't find any better wording in the New England Supplement - I also didn't spend a lot of time looking.
In the central it's very clear:
Section 8 In a scheduled workweek in which there is a paid holiday, the guaranteed workweek shall be thirty-two (32) hours; in any scheduled workweek in which there are two (2) paid holidays, the guaranteed workweek shall be twenty-four (24) hours, etc. For hours worked in excess of thirty-two (32) or twenty-four (24) hours in a week, as applicable, an employee shall be paid at the rate of one and one-half (1 1/2) time the regular straight-time rate, provided the holiday or holidays fall within the scheduled workweek.
Also:
UPS and UPS Freight Agreements, 2018 – 2023
for all the contracts/supplements