I am working on bringing my ITB car back on to the SCCA track and I have being thinking about the cage.

The car currently has a bolt in Safety Devices roll cage with additional welded in braces. The log book does not say if the cage is ERW, DOM, or even Cold Drawn Seamless tubing (CDS) that Safety Devices used for some of their cages. It just lists the size as 1.50 x .120. The car started racing back in 1981. I have not raced the car with SCCA since 2001.

My question is the GCR states that: "Note: ERW tubing is not permitted in any car registered with SCCA after of 01/01/2003."

Is this for new registrations or for all cars, old and new?

What is the best way to tell if it is ERW?