(1) The enhanced services facility must ensure that an assessor performing an assessment for any potential or admitted resident has experience working with residents who have severe behavioral issues due to but not limited to functional or cognitive disabilities, mental health or chemical dependency disorder, or both, or an organic or traumatic brain injury and meets the following qualifications:

(a) A master's degree in social services, human services, behavioral sciences or an allied field and two years social service experience working with adults who have severe behavioral issues; or

(b) A bachelor's degree in social services, human services, behavioral sciences or an allied field and five years social service experience working with adults who have severe behavioral issues; or

(c) Has a valid Washington state license to practice as a nurse under chapter 18.79 RCW and three years of clinical nursing experience working with adults who have severe behavioral issues; or

(d) Is currently a licensed physician, including an osteopathic physician, in Washington state with experience working with adults who have severe behavioral issues; or

(e) Is a licensed psychologist or psychiatrist; or

(f) Is a professional appropriately credentialed or qualified to provide chemical dependency, mental health, organic or traumatic brain injury and/or functional or cognitive services and work experience with adults who have severe behavioral issues.

(2) The facility must ensure that an assessor who meets the requirements of subsection (1)(a), (b), (c), (d), (e), or (f) of this section does not have unsupervised access to any resident unless the assessor has:

(a) A current criminal history background check; and

(b) Has no disqualifying criminal conviction or pending charge for a disqualifying crime under chapter 388-113 WAC, or a negative action that is disqualifying under WAC 388-107-1290, unless the individual is eligible for an exception under chapter 388-113 WAC.