(1) A medical assistant-registered shall have a current attestation that is filed with the department and signed by a health care practitioner endorsing him or her to perform specific tasks authorized in RCW 18.360.050(4).

(2) The medical assistant-registered shall only perform the tasks listed in his or her current attestation of endorsement filed with the department.

(3) An endorsement is valid as long as the medical assistant-registered is continuously employed by the same health care practitioner, clinic or group practice.

(4) A medical assistant-registered shall submit a new attestation of endorsement to the department within thirty days if the tasks listed on the current attestation change.