All openings, obstructions or areas where the sidewalk is removed shall be carefully guarded, protected or barricaded at all times, and during the night season shall be defined by lights and such other precautions as shall be necessary to guard against accidents. The Service Director may issue any additional orders as he deems proper which shall be implicitly and promptly complied with. At all times the work shall be done so as to cause the least inconvenience to property owners and the general public. (Ord. 1962-20. Passed 7-23-62.)