when is form tag required?

[Ken]

Hi,

Given commandButton, commandLink, and outputLink all render as html anchors, I only wrapped them with form tags when a form field was required (inputText, selectItem...).  Everything worked fine across multiple browsers in myfaces 1.1.1.

Now with myfaces 1.1.3 and tomahawk 1.1.2, I'm having a difficult time finding consistent behavior.  Does anyone know when the commandButton and commandLink tags require to be in a form (or require a form within it's page) in order to execute its action event?

Thank you all for any insights you may share,
Ken