Is there any way for a WSE 3.0 client, using policy, to suppress the addressing headers and timestamp in the soap header request

I tried commenting out the <requireActionHeader> and the signatureOptions attribute to only sign the SoapBody in the policy file, but I see that the request still contains the <wsa:Action, the <wsa:MessageId, and the <wsu:Timestamp elements.

Also if any of you knew how to suppress these fields in the response.