At all fires occurring within the City, the Fire Chief or Police Chief and all fire personnel and police officers shall act as a fire guard under the direction of the officer of the Fire Department in charge. It shall be the duty of the fire guard to keep all idle and suspected persons from the fire and its vicinity and to use all proper measures within their power to protect life and property. Any person failing to comply with either of their directions shall be guilty of a violation of this chapter. (Ord. 2388 § 9, 1990; prior code § 14.6).