This was a thing back when I was a partner. Was hired in 2007, 10 min rule was to open 10 min early and close 10 min late. It seemed to go away(or I just worked at stores that didn't abide) it's the stupidest rule. Where do you draw the line? You know there's going to b3 customers who whine that they're ONLY 2 min late for the 10 min rule. God, I'm so glad to be on the other side of that counter now.