That was pretty funny

There are two types of rules regional airlines pass out via memos/policies/etc.:

1) Rules intended to scare gullible/fearful sheep into compliance. These rules are often uneforceable/illegal grounds for termination or discipline (which the company knows), and the company will never actually enforce them (that would take too much manpower, which costs money, and expose the company to legal claims, which costs even more money).

2) Rules that are actually legally-enforceable, which in aviation usually means having something to do with safety, or something explicitly addressed in a contract. These types of rules would actually stand up in court as a stated reason for termination/discipline.

Most rules issued at 9e are Type 1 rules. No middle manager will ever actually do anything to enforce them-it's just there to show Delta that 9e is being a good little boy and doing what daddy tells him.

If anyone actually gets in trouble for going into the Skyclub on a sit, tell them to cite this reg-unless per diem is equal to minimum wage, I'd say they can't legally tell you you can't go into the Skyclub (assuming you have a legit membership).

29 CFR 785.16 and 29 CFR 785.17
C. Waiting or On-Call Time

By logical extension, if this were a legal policy, the company could similarly tell you you can't go to Hudson News to buy a magazine because some noobie FO ate too many Flipz on airport reserve and puked on all the copies of Good Housekeeping, irritating a first class DAL passenger from Savannah, eliciting a complaint to Daddy Delta.