Dont worry about Amendments or Amendment Orders. Just go to the list of CAOs and print off all the relevant ones in that range. Of particular interest are 20.7.1B, 20.11, 20.18, 20.9, 40.0, 40.1.0, 40.2.1, 48.1.
Ignore anything that is not relevant to your exam (ie, heli/airship/gyroplane, agricultural, sling loads, etc)