(1) A group of physicians practicing other than as sole practitioners may designate 1 or more physicians in the group to enter into a practice agreement under section 17547.

    (2) Notwithstanding any law or rule to the contrary, a physician is not required to countersign orders written in a patient's clinical record by a physician's assistant with whom the physician has a practice agreement. Notwithstanding any law or rule to the contrary, a physician is not required to sign an official form that lists the physician's signature as the required signatory if that official form is signed by a physician's assistant with whom the physician has a practice agreement.