4.1 Applications should have consistent presentation
4.2 Controls should be arranged so that they can be navigated in a logical task order.
4.3 The application should not change the context (open new windows, move the focus to a different component, move to a new page) without informing the user.
4.4 Warning/Error messages should persist until the issue is corrected or the warning dismissed.
4.5 The application should help users to avoid and correct mistakes
4.6 Provide users with ways of determining where they are in the context of the application