No building shall be erected until the Village Clerk or Superintendent of Buildings shall issue a permit certifying that the proposed building and use comply in every respect with this chapter, and all applications for such permits shall be in writing and accompanied by a plot plan in duplicate drawn to a scale showing the actual dimensions of the lot to be built upon, the size of the building to be erected, the location of the building upon the lot, the dimensions of all open spaces, the setback lines observed by buildings within the block and proof, by certificate from an insurance company licensed to do business in the State of New York, that the contractor or person or persons performing the work carries liability insurance in limits commonly referred to as $250/500,000 for bodily injuries and $50,000 for property damage, and such other information as may be necessary to provide for the enforcement of this chapter. Such certificate shall provide that no revocation of said insurance shall be effective except upon 10 days notice to the Village Clerk. The requirement of a certificate of insurance shall be waived in connection with any application for construction whose actual cost is $999 or less. Such permit shall be issued for a period of six months from the date thereof. In the event, however, of a change in the provisions of this chapter or in the map accompanying the same, during such period of six months, which change or changes would prevent the issuance of such permit if then applied for and if the Superintendent of Buildings or Village Clerk shall determine that work has not begun under such permit, he shall revoke said permit and immediately send notice of revocation thereof to the holder thereof at the address given in the application therefor. The Superintendent of Buildings or Village Clerk is also authorized at any time during the life of such permit to revoke the same if it shall satisfactorily appear to him that any material statement in or portion of the application therefor is untrue or inaccurate. Within 10 days prior to the expiration of such permit and upon showing of sufficient cause therefor, and in the event that no changes in this chapter or in the map accompanying the same have been made to prevent, the Superintendent of Buildings or Village Clerk may extend the permit for a further period of six months but such extended permit shall be liable to all the provisions of this section as if the same were an original issuance thereof. A copy of this section shall be printed upon each permit or extended permit issued by the Superintendent of Buildings or Village Clerk.