Section 205 ILCS 5/31.1 - Savings association branch; bank branch(a) A State bank that purchases an Illinois branch of an insured savings association that is not an eligible depository institution may establish and maintain that branch as a branch of the purchasing State bank.(b) Nothing in this Section shall authorize a State bank to acquire, hold, or invest any asset or to assume or incur any liability that does not conform to the legal requirements for assets acquired, held, or invested or liabilities assumed or incurred by State banks, or to engage in any activity in which a State bank is not authorized to engage as part of a general banking business.