Premium Pay
Premium Pay is an important provision in your contract. In essence it provides that you'll be paid time-and-a-half if you have to work on your regularly scheduled day off, with a minimum pay-out of 5 hours. If you work more than 5 hours, the pay-out jumps to 7 hours. Over 7, it's actual time worked.
And you're covered whether you're eligible for over-time or not.
All you have to do is file for it.
From the contract:
Article II. Hours and Overtime.
Paragraph F.
If an Employee is assigned to work on his or her day off in any payroll week, including Employees working 3- or 4-day work weeks, or if an Employee is required to work on the day of a previously requested and approved optional holiday or floater, pursuant to Article VIII A or B, he or she shall be paid a minimum of five (5) hours pay at the rate of time and one-half, except that if an employee works more than four (5) hours on such a day, he/she shall be paid a minimum of seven (7) hours pay at the rate of time and one half. This provision shall apply to both overtime exempt and non-exempt Employees. In addition, if such time worked is a previously approved floater, the Employee will be permitted to use that floater on a future day pursuant to the provisions of Article VIII A or B.