A domestic mutual insurance company, other than a mutual life insurance company, may acquire by purchase, lease or otherwise or receive, hold or convey real estate, or any interest therein, in accordance with the laws of this Commonwealth relating to real estate that may be acquired by purchase, lease or otherwise or received, held or conveyed by stock fire, stock marine, or stock fire and marine insurance companies. Mutual insurance companies which do not possess a certificate of authority to issue nonassessable insurance policies may only invest in such real estate necessary for the convenient accommodation of its business and may maintain cash balances necessary for the transaction of its business.
40 P.S. § 913.1