No owner or operator of any automobile trailer shall permit the same to be parked or harbored, when used for sleeping or living quarters within the limits of the City for an accumulated period exceeding fourteen days in any period of twelve months. The wheels of a trailer parked or harbored in the City shall not be removed except for temporary purposes. Where a trailer is occupied by more persons than the number for which it is designed and arranged or where it is so overcrowded that, it constitutes a danger to health or morals, it shall not be permitted to remain within the City limits for more than twenty-four hours.