NCUA amends its regulation dealing with newly chartered and troubled credit unions that requires prior notice of the appointment or employment of directors and senior officers. The amendment clarifies when the notice period commences and when the new director or senior officer may begin service. Also, for corporate credit unions, the amendment clarifies that the definition of a ``troubled'' credit union will be based on the Corporate Risk Information System (CRIS), or on CAMEL for those state- chartered corporate credit unions in states that do not adopt CRIS. Finally, the amendment reflects that corporate credit unions should submit notices of changes in officials or senior management to the Director of the Office of Corporate Credit Unions.