Two or more companies authorized to transact business in this State may issue a combination or group form of policy, using a distinctive title therefor, which title shall appear at the head of such policy followed by the titles of the companies obligated thereupon, and which policy shall be executed by the officers of each such companies; provided, that before such companies shall issue such combination or group policy, the title of such proposed policy and the terms of the additional provisions thereof, hereby authorized, shall have been filed with the Director, which terms, in addition to the provisions of the standard policy and not inconsistent therewith, shall provide substantially under a separate title therein, as follows:
215 ILCS 5/399