No house-car trailer shall be maintained in the village as a permanent office. The office use shall be allowed as is compatible with the demonstration and sale of articles or services as may be readily transported in a house-car trailer on a legally located parking lot within the business or industrial area of the village for a period of time not to exceed seven days, provided the house-car trailer is not used for sleeping or living purposes during that time.
(1986 Code, § 8-3-5)