No person shall, except in case of fire, or when giving the alarm of fire, open, break into, or ring any of the fire alarms. However, the provisions of this section shall not in any way apply to any member of the Fire Department whose duty it is to open or ring the fire alarm boxes, or otherwise, in case he or they are instructed to do so for the purpose of altering or repairing the same.
('80 Code, § 9.20.020) Penalty, see § 10.99