Exceptions. The removal of earth products, which term shall include all types of soil, humus, loam, sand and gravel, as well as bedrock, is prohibited unless authorized by the Select Board except under the following circumstances:
(1)
When such removal is incidental to and in connection with the erection of a building for which a building permit has been issued by the Building Inspector of the Town;
(2)
When such removal is required in order to construct a street that has been approved by the Planning Board;
(3)
When such removal is in accordance with special permission from the Board of Appeals issued under the provisions of existing bylaws now in effect.