(a) A multiple employer welfare arrangement (MEWA) licensed under this subchapter may not take any name that is the same as or closely resembles the name of another MEWA possessing a certificate of authority and doing business in this state. A MEWA must complete a name application form, as described in §7.1904(b)(1) of this title (relating to Application for Initial Certificate of Authority), to transact business under its own name and may not adopt any assumed name, except that a MEWA by amending its articles may change its name or take a new name with the approval of the commissioner.(b) Whenever it is necessary in any legal proceeding to prove the existence of a MEWA, a certified copy of the MEWA's certificate of authority is prima facie evidence of the existence of the MEWA.