Since this is intended for Staff, if you want to add Police/Tow I recommend download @OfficialBadger’s PoliceEMSActivity .
If you have another script for On-Duty/Off-Duty, I’d recommend you switch from your current one to Badger’s where it just uses /duty.
Neither of our scripts support more than one duty command (just /duty, no /onduty or /offduty) so you’d have to code that in yourself.