It shall be lawful for any fireman while acting under the direction
of the Fire Chief or other officer in command to enter upon the premises
adjacent to or in the vicinity of any building or other property then
on fire for the purpose of extinguishing such fire and in case any
person shall hinder, resist or obstruct any firemen in the discharge
of his duty as is hereinbefore provided, the person so offending shall
be deemed guilty of resisting firemen in the discharge of their duty.