I have got emails asking some questions by the SPA pilots about the requirments for CPA.. So instead of a bunch of emails, here is a blanket answer......

1) Yes SPA planes can be used in CPA.

2) The patterns are very close, so If your flying SPA you can fly CPA. Here is the patterns http://classicpatternassociation.com...call_cards.pdf

3) You do not need to join CPA to fly in any of the classes.

4) Retracts and Pipes are not required !

you can find more at http://classicpatternassociation.com