SCCA EP == ICSCC EIP - YES
ICSCC EP == SCCA EP - NO
ICSCC EP is Conference E Production. This was a very popular class a long time ago but now sees very few entries. The rules are listed in Section 1402 of the ICSCC Competition Regulations. There is A through G Production and is based on stock factory horsepower and a weight:horsepower ratio to determine which class. Conference Production allowable modifications are very similar to SCCA Improved Touring but there are a few modifications that are legal for Conference Production and not for Improved Touring and a few the other way.