Sign on the control room door

The sign would say
CO- Denied
MO- Denied
ERT-Denied
Comm- allowed
Inspector- allowed
Dept warden- allowed
Warden-allowed
Cp-allowed

This would be very good as it is very annoying when people have to spend hours of their day telling ert and co to get out.

An alternative would be to have a card system where comm+ can open any door
Co and mo normal doors
Ert- high security doors and normal

To be honest not really needed, but only Comm can control the board,
and when a ERT or below it will show a pop up saying "You need to be a Commander or above to use the control board.