Wash. Admin. Code § 246-240-263
In addition to the requirements of WAC 246-222-030:
(1) The licensee shall provide radiation safety instruction, initially and at least annually, to personnel caring for patients or human research subjects who are receiving brachytherapy and cannot be released under WAC 246-240-122. To satisfy this requirement, the instruction must be commensurate with the duties of the personnel and include the:
(d) Visitor control, including both:
[Statutory Authority: RCW 70.98.050. WSR 06-05-019, § 246-240-263, filed 2/6/06, effective 3/9/06.]