Chapter 1 section 6 of the AKC HT Regs and Guidelines says in part
"Prior to Becoming Eligible to Judge the Senior/
Master Test. Individuals that have not judged Senior
or Master tests prior to January 1, 2012 must first have
judged at least twice at the testing level immediately
below before they are eligible to judge a Senior or Master
tests. (Club’s responsibility to monitor.)"