The department is required to adopt and publish, for the information of the public, all reasonable rules necessary for carrying out the provisions of this chapter. The department may amend or rescind any rule adopted under the authority contained in this section. However, no rule or amendment of the same or any order rescinding any rule shall become effective until after thirty days from the adoption of the same by publication in a newspaper of general circulation published at the state capitol and shall take effect and be in force at times specified therein. All rules of the department and all amendments or revocations of existing rules shall be recorded in an appropriate book or books, shall be adequately indexed, and shall be kept in the office of the department and shall constitute a public record. Such rules of the department shall be printed in pamphlet form and furnished to the public free of cost.