The Conference of State Bank Supervisors has produced a calculation spreadsheet to help banks estimate changes in their minimum capital requirements under the federal banking agencies’ advanced notice of proposed rulemaking. The ANPR would establish so-called Basel 1A capital rules for banks and thrifts that will not be subject to the Basle II capital accords, which are slated to kick in December 2006. Basel II, which would be relevant only to internationally active U.S. banks,…