No person shall injure or deface any monument established and located in any street, alley or public ground in the City for the purpose of determining location of grades, or which shall hereafter be established and located for such purposes, by competent authority, or dig up, or in any manner remove, or uncover and expose such monuments without written authority from the Director of Public Service; and no person, who having exposed and uncovered any monument under such authority, shall neglect to replace the covering so removed in as good condition as before removal.
(1952 Code § 7-2-11)