(2) If the policy provision set forth in subsection (1) of this section is included in a policy which also contains the policy provision set forth in ORS 743.459, there shall be added to the caption of the provision set forth in subsection (1) of this section the phrase "OTHER BENEFITS." The insurer may, at its option, include in this provision a definition of "other valid coverage," approved as to form by the Director of the Department of Consumer and Business Services, which definition shall be limited in subject matter to coverage provided by organizations subject to regulation by insurance law or by insurance authorities of this or any other state of the United States or any province of Canada, and to any other coverage the inclusion of which may be approved by the director. In the absence of such definition such term shall not include group insurance, or benefits provided by union welfare plans or by employer or employee benefit organizations. For the purpose of applying the policy provision set forth in this section with respect to any insured, any amount of benefit provided for such insured pursuant to any compulsory benefit statute (including any workers’ compensation or employer’s liability statute), whether provided by a governmental agency or otherwise, shall in all cases be deemed to be "other valid coverage" of which the insurer has had notice. In applying the policy provision set forth in this section no third party liability coverage shall be included as "other valid coverage." [1967 c.359 §446]