In any action filed on or after January 1, 1991, taken to challenge the validity of a housing element, both of the following shall apply, as applicable:
(a) There shall be a rebuttable presumption of the validity of the element or amendment if, pursuant to Section 65585, the department has found that the element or amendment substantially complies with the requirements of this article.
(b) There shall be a rebuttable presumption of the invalidity of the element or amendment if, pursuant to Section 65585, the department has found that the element or amendment does not substantially comply with the requirements of this article.