The provisions of Sections 57-1-251 through 57-1-261 are cumulative of other statutes now or hereafter enacted relating to the department, and the department may exercise all presently held powers in the furtherance of Sections 57-1-251 through 57-1-261. If any section, paragraph, sentence, clause, phrase or any part of the provisions of Sections 57-1-251 through 57-1-261 is declared to be unconstitutional or void, or for any reason is declared to be invalid or of no effect, the remaining sections, paragraphs, sentences, clauses and phrases shall in no manner be affected thereby but shall remain in full force and effect.