13. Facilities to be afforded to Inspecting Officers. - The master or the agent of the owner of any vessel in port with carbide on board shall, when so required by the, Collector of Customs or by the Conservator of port or by an Inspector or Sampling officer, show to such officer all carbide under his control or on board, and shall afford every reasonable facility to enable such officer to inspect such carbide so as to ascertain whether the provisions of these rules are duly observed and to take samples free of charge, if such officer so desires.
