Is it appropriate to confront a higher rank when they are blatantly disregarding regs?

Some may lack the intestinal fortitude to do this in providing on the spot corrections!

Very Tactfully!

I wouldn't say confront. Such a harsh word. Politely question. Sir/Ma'am, you are telling me to do "X" but the regulation states "Y", could you please clearify.

Seriously? The Air Force has regulations on uniforms and grooming?

We have a warrant who come in galley with socks and his sweaty Tour de France jersey on. It’s gross

Yes, you should make on the spot corrections. Use tact and be respectful. As a senior leader I welcome corrections from a lower rank if I am out of regulations. First off, it's better to be corrected by a Private than a SGM any day of the week. Second, and most important, a Soldier of a lower rank making that correction shows me they are reading and understanding the regulations. We all make mistakes and always should seek improvement. By respectfully accepting a correction, a leader is helping a subordinate and developing the Soldiers courage. Yes, it takes courage for a Soldier to do that, especially in a toxic environment. As leaders, we should not punish or otherwise condemn a junior Soldier for doing this. We should insure the Soldier is correct. If not, a good leader will show them where they are incorrect in a non- threatening manner. They are learning. If correct, acknowledge they are right aND make the correction. Either way, do not be hostile or display any kind of hostility. We are here to develop junior Soldiers and NCO's.

I’m seeing a lot of correct answers.
Make the correction as tactfully AND as privately as possible.

OMG! She looks like my former Commander, is her las name Kim?

I wouldn't shout it across the chow hall. But pull them aside and say something. If they want to rage take it to their higher up in the coc.

The proper way to handle this is to find a higher ranking person and explain to them what is going on. This person will then go to the female and ,in private of course, explain to her the regs she is violating and that she needs to rectify the situatuon. You ,as a junior person, cannot do this. You will,most likely, be told to mind your business. But someone senior to her wouldn't get that crap. If they do,they have the authority to do something about it.