This just in from CNBC:
Government is requiring at a minimum a tier 1 ratio of 6% and TCE or tangible common equity of 4% to be maintained until the end of 2010. The 19 banks are asked to submit capital plans and have those plans approved by supervisors by June 8. These ratios are expected to be implemented by November 9, when the capital plans are expected to be completed.
Correction made: From November 15, changed to November 9.