The director may adopt, promulgate and enforce all rules, regulations and orders necessary to carry out the provisions of this act. An order applying only to a person named therein shall be served on the person affected by personal delivery of a certified copy or by mailing a copy thereof to him at his last known address, and if such person be a corporation then the order shall be served in the same manner upon any officer or agent of the corporation upon whom a summons may be served, pursuant to the provisions of section 2:26-43 of the Revised Statutes.
All rules, regulations and orders adopted by the director shall be filed by him in his office and said file shall be a public record.
All orders and determinations of the director shall include the findings of fact upon which such orders or determinations are based.