(2) The policy provision set forth in subsection (1) of this section may be inserted only in a policy which the insured has the right to continue in force subject to its terms by the timely payment of premiums until at least age 50 or, in the case of a policy issued after age 44, for at least five years from its date of issue. The insurer may, at its option, include in this provision a definition of "valid loss of time 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 governmental agencies or 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, or to any other coverage the inclusion of which may be approved by the director or any combination of such coverages. In the absence of such definition such term shall not include any coverage provided for such insured pursuant to any compulsory benefit statute (including any workers’ compensation or employer’s liability statute), or benefits provided by union welfare plans or by employer or employee benefit organizations. [1967 c.359 §447]