MCB Quantico Non-DoD CAC Holder  OIC/RSO In-Person Brief  MCB Quantico Installation Range Officer-In-Charge (OIC) and Range Safety Officer (RSO) Brief Will be held in the Range Control Safety/Scheduling Office (Bldg 24144) on the last Friday of each month unless impacted by a Federal Holiday as indicated by (*) and conducted earlier in that month as noted.