Bob, I’ve been to the class and got the booklet…
.According to the " Assessor’s manual For Conducting Mariner Assessments"
Which I will link for you at the end…
On page 1,… 2 nd paragraph .It’s titled The role of the Assessor…
An assessor should hold the level of license,endorsement,or professional credential required for the proficiency being assessed.
http://uscg.mil/nmc/marpers/pag/Guidance_for_Assessors_manual.pdf