After a hearing on an appealed action pursuant to Section 29770, the commission shall either deny the appeal or remand the matter to the local government or local agency for reconsideration, after making specific findings. Upon remand, the local government or local agency shall modify the appealed action and resubmit the matter for review to the commission. A proposed action appealed pursuant to this section shall not be effective until the commission has adopted written findings, based on substantial evidence in the record, that the action is consistent with the resources management plan, the approved portions of local government general plans that implement the resources management plan, and this division.