Make-Up Session

At the Park Slope Food Coop, where I'm considering membership, one has to be a owner-worker-shopper-member, which means you have to work at the store in order to be included in this socialist revolution. It's only 3 hours every 4 weeks, but apparently, it's not always the easiest thing to work in. If you miss a shift or have to reschedule, your shift leader is authorized (but not required) to give you 2 make-ups to, well, make up for the one you missed.

Does the two make-up rule apply here?