To the fullest extent as permissible under Federal law and regulations, a bank holding company, as defined by the Federal Bank Holding Company Act (70 Stat. 133, 12 U.S.C. § 1841 et seq.), and a savings and loan holding company, as defined by section 10 of the Home Owners' Loan Act of 1933 (48 Stat. 128, 12 U.S.C. § 1467a), located in this Commonwealth, another state, the District of Columbia or a territory or possession of the United States may control one or more banks, bank and trust companies, national banks, interstate banks, savings banks, savings associations, building and loan associations or Federal savings associations and, with the prior written approval of the department, may acquire control of a bank, bank and trust company, national bank, savings bank, savings association, building and loan association or Federal savings association located in this Commonwealth.