I encourage you to review the rules. IGC is LESS complex,simpler and easier to understand. IGC rules are 15,091 words long compared to 25,804 (US rules).

http://www.fai.org/igc-documents

Go to Sporting Code Section 3 Annex A

1. No 1-34s, etc. so we don't have to worry about low performance gliders when task setting.
YES

2. No LS-6s, Venti and ASW-20Bs&Cs.
No LS-6 or Venti. ASW-20B&Cs HAVE BEEN allowed. They are specifically excluded in Argentina at the next WGC.

3. No speed or altitude limits prior to the start.
Altitude limits are up to CD discretion, similar to US Rules.

4. Much more emphasis on ATs.
YES. There are ONLY Racing Tasks (AT) and Assigned Area Tasks. 50/50 seems to be the philosophy.

5. Score everything according to FAI rules.
YES. See scoring calculations on page 31 & 32 of FAI SC3a rules.

Sean Franke