The authority to perform the functions authorized in chapter 18.135 RCW may only be personally delegated from one individual (the delegator) to another individual (the delegatee). The delegator can only delegate those functions that he or she can order within the scope of his or her license. A licensee who is performing a function at or under the direction of another may not further delegate that function. Functions may not be delegated unless a completed and current certification/delegation form is on file with the department of health.