Generally speaking, security is allowed to be in most station areas so as long as they are not actively causing disruption of normal, lawful workflow or activity. An exception to this would be sensitive areas such as the Bridge, Armory, or Head of Staff offices if they have no valid purpose for being there to begin with. If a head of staff takes issue with security being in a particular area they see over, it is an IC issue that should be brought up to the Head of Security or designee.
Command is not required to enable this access by granting security officers IDs with access to these departments.
Limitations
This clarification does not address security hacking into or breaking into departments.