The assisted living facility must ensure the person responsible for completing a preadmission assessment of a prospective resident:

(1) Has 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 functional or cognitive disabilities; or

(2) Has a bachelor's degree in social services, human services, behavioral sciences, or an allied field and three years social service experience working with adults who have functional or cognitive disabilities; or

(3) Has a valid Washington state license to practice nursing, in accordance with chapters 18.79 RCW and 246-840 WAC; or

(4) Is a physician with a valid state license to practice medicine; or

(5) Has three years of successful experience acquired prior to September 1, 2004, assessing prospective and current assisted living facility residents in a setting licensed by a state agency for the care of vulnerable adults, such as a nursing home, assisted living facility, or adult family home, or a setting having a contract with a recognized social service agency for the provision of care to vulnerable adults, such as supported living.