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<extension
          point="org.eclipse.ui.handlers">
      <handler
            class="org.eclipse.team.internal.ccvs.ui.actions.CommitAction"
            commandId="org.eclipse.team.cvs.ui.commit">
  <activeWhen>
    <adapt type="org.eclipse.core.resources.mapping.ResourceMapping">
      <test 
        property="org.eclipse.core.resources.projectPersistentProperty"
     args="org.eclipse.team.core.repository,org.eclipse.team.cvs.core.cvsnature"
        />
    </adapt>
  </activeWhen>
         <enabledWhen>
                         <test
                               args="CommitAction"
                               property="org.eclipse.team.cvs.ui.isHandlerEnabled"/>   
         </enabledWhen>         
  	  </handler>      
...