Unless a later date is stated in the order, a final order of an administrative agency is effective immediately, but a party may not be required to comply with a final order unless it has been served upon the party and notice is deemed given pursuant to section 28-32-39 or the party has actual knowledge of the final order. A nonparty may not be required to comply with a final order unless the agency has made the final order available for public inspection and copying or the nonparty has actual knowledge of the final order. This section does not preclude an agency from taking emergency action to protect the public health, safety, or welfare as authorized by statute.