Here is a validation set comprising 20% of the original text:

Structure, Nonconforming: A structure lawfully existing at the effective date of this by-law or any subsequent amendment thereto, which does not conform to one or more provisions of this by-law.

Truck Terminal: A facility for handling freight with or without maintenance facilities.

Use, Accessory: A use incidental and subordinate to the principal use of a structure or lot, or a use, not the principal use, which is located on the same lot as the principal structure. 

Warehouse, Mini or Self Storage: Establishment providing individual storage units for long or short term rental to persons or businesses.

Yard, Front: A yard extending for the width of the lot between the front line of the nearest building wall and the front lot line.