No policy of industrial insurance shall be delivered in this Commonwealth, unless the same shall contain in substance the following provisions:
Any such policy may be delivered in this Commonwealth which, in the opinion of the Insurance Commissioner, contains provisions on any one or more of the several foregoing requirements more favorable to the policyholder than hereinbefore required. The policies of an insurance company organized under the laws of any other state or foreign government may contain, when delivered in this Commonwealth, any provision which may be prescribed by the laws of the state or government under which the company is organized not contrary to the provisions heretofore prescribed, and the policies of a life insurance company organized under the laws of this Commonwealth, when delivered in any other state, territory or foreign country, may contain any provision required by the laws of such state, territory or foreign country to be contained in the policies delivered therein.
Any of the foregoing provisions, or parts thereof, not applicable to nonparticipating policies shall, to that extent, not be incorporated therein and the provisions of this section shall not apply to policies issued or granted pursuant to the non-forfeiture provisions prescribed in clause (f) of this section. A clause in any policy of industrial life insurance providing that such policy shall be incontestable after a specified period shall preclude only a contest of the validity of the policy, and shall not preclude the assertion, at any time, of defenses based upon provisions in the policy which exclude or restrict coverage, whether or not such restrictions or exclusions are excepted in such clause.
40 P.S. § 574