(1) A pharmacist may partially fill a prescription for noncontrolled legend drugs and controlled substances listed in Schedule III through V provided that:
(a) The partial fill is requested by the patient or the prescriber;
(b) The partial filling is recorded in the same manner as a refilling;
(c) The total quantity dispensed and delivered in all partial fillings must not exceed the total quantity prescribed; and
(d) Partial fills for controlled substances listed in Schedule III through V comply with 21 C.F.R. Sec. 1306.23.
(2) A pharmacist may partially fill a prescription for a controlled substance listed in Schedule II within the limits of RCW
18.64.265, 21 U.S.C. Sec. 829, and 21 C.F.R. Sec. 1306.13, as applicable.