The provisions of Sections 57-1-351 through 57-1-369 are cumulative of other statutes now or hereafter enacted relating to DECD, and DECD may exercise all presently held powers in the furtherance of Sections 57-1-351 through 57-1-369. If any section, paragraph, sentence, clause, phrase or any part of the provisions of Sections 57-1-351 through 57-1-369 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.