No person shall remove or insecurely fix, or cause to procure or suffer or permit to be removed or to be insecurely fixed, so that the same can be moved in its bed, any grate or covering of any coal hole, vault or chute under any street, sidewalk or other public place, under penalty of not less than ten dollars ($10.00) for each offense.
Provided, that nothing herein contained shall prevent the owner or occupant of the building with which it shall be connected from removing such grate or covering for the proper purpose of such coal hole, vault or chute, provided he enclose such opening or aperture, and keep the same enclosed while such grate or covering shall be removed, with a strong box or curb at least two feet high, firmly and securely made. And provided further, that he shall not remove such grate or covering until sunrise of any day and shall replace such grate before one-half (1/2) hour after sunset.