It is not a nationwide legislative requirement that persons be over 18 to serve cigarettes, some states allow it. Also, it is not a store based policy in regards to mature aged supervisors, I have pushed and pushed and they won't budge, this goes for other stores in my area and head office also tells me it's against policy too, so I'm betting my bottom dollar that it is...
Routines for everything differ greatly from store to store, yet alone from state to state. Our opening routine is very different to bensneddon's.
Put the money back in the tills, self serve person opens self serve, change order, trolley/basket count, newspapers, plan the grids (registers for people to use), do stock or any other job that is needed to be done.