It shall be unlawful for any person:
A. To knowingly prevent, obstruct, harass or endanger, by any means, any police officer, fire officer or other official or employee, or any military personnel on emergency duty within the city in the lawful performance of his duties.
B. To knowingly or wilfully refuse or neglect to obey, without reasonable justification therefor, any lawful order or direction of any police officer, fire officer or other official or employee, or any military personnel on emergency duty within the city. (Ord. 153, 8-21-1972)