The department is charged with the enforcement of this chapter and, after due publicity and due public hearing, is empowered to establish rules, regulations, specifications, standards, and tests as necessary in order to secure the efficient administration of this chapter. Publicity concerning the public hearing shall be reasonably calculated to give interested parties adequate notice and adequate opportunity to be heard. In establishing such rules, regulations, specifications, standards, and tests the department may use the specifications and tolerances established in section 215.18, and shall use the specifications and tolerances established by the United States department of agriculture as of November 15, 1971, in chapter XII of GR instruction 916-6, equipment manual, used by the United States department of agriculture grain inspection, packers and stockyards administration. The department may from time to time publish such data in connection with the administration of this chapter as may be of public interest.