If the guardianship family resides in or moves to another state, the GAP subsidy is affected as follows:

(1) The Washington state department remains responsible for any GAP cash payments; and

(2) Medical services:

(a) If the child or youth is eligible for Title IV-E medical services through the medicaid program, the state in which the guardian family resides is responsible for providing their medical benefits; and

(b) If the resident's state plan does not include the needed service that Washington state's medicaid plan includes, then it remains Washington state's responsibility to provide the needed service subject to Washington state's medicaid plan's limits and requirements.