A. Any person maintaining any pipe, conduit, or pole in any street by virtue of any law, ordinance or franchise, may proceed with an excavation without a permit as herein required when emergency circumstances require the work to be done immediately for the preservation of the public peace, health, safety or welfare, provided the permit could not reasonably and practically have been obtained beforehand. Such person shall thereafter apply for a permit on the first day on which the office of the Division is open for business, and such permit shall be retroactive to the date when the work was begun.
B. Any division, department, officer or employee of the City may perform work without a permit as herein required when such work is a normal function of or is within the responsibility or jurisdiction of such division, department, officer or employee.
('65 Code, § 30-24)