The banking board shall establish by rule the capital standards and guidelines, the methods for measuring capital, and the definitions of "capital", "capital adequacy", "capital inadequacy", and other related terms for banks subject to this code, that may differ for specific purposes. In promulgating such rules, the banking board shall consider all relevant factors, including, without limitation, the policies set forth in section 11-101-102 and relevant federal laws and rules. Each bank subject to this code shall at all times comply with the capital rules promulgated by the banking board.