Except as permitted by Section 201.3.9. of this Ordinance, the storage or parking of any commercial truck upon any residentially-zoned lot, or lot used principally for residential purposes, is prohibited. For purposes of this section, commercial trucks shall include those that exceed a gross vehicle weight (truck plus rated payload) of ten thousand (10,000) pounds. In addition, the parking or storage of any truck trailer, other than those accessory to a principal residential use, is expressly prohibited on any residentially-zoned lot, or a lot used principally for residential purposes. The parking and/or storage of trucks, trailers and recreational vehicles that are considered accessory to a principal residential use are subject to the requirements of Section 327.4. of this Ordinance.