The period of accreditation must not exceed three years. Applications for renewal of accreditation must be made on the same form as described in WAC 296-304-14001. No accreditation must expire until action on an application for renewal must have been finally determined: Provided, That such application has been properly executed in accordance with WAC 296-304-14001 and filed with and received by the director not less than 15 nor more than 60 days prior to the expiration date. A final determination means either the approval or initial denial of the application for renewal. The procedure specified in WAC 296-304-14003 must be applicable to all applications for renewal.