14. The minimum distances prescribed in section 13 do not apply to a sign advertising(1) the harvesting or sale of agricultural products, provided it is not displayed outside the harvesting period or within one metre of the right-of-way of the highway, rest area or lookout and provided there are not more than two advertising signs at the same harvesting place;
(2) the sale or lease of all or part of an immovable, provided it is displayed on the immovable.