Like others have said, you can show them the law all you want, but seeing it printed on law office letterhead has more effect.
You have to judge how serious your employer is about this. Some employers are quite rabid about rules and others have policies written down simple to be able to enforce them if other reasons necessitate it, or simply to limit liability.
You have to judge how serious your employer is about this. Some employers are quite rabid about rules and others have policies written down simple to be able to enforce them if other reasons necessitate it, or simply to limit liability.