Make-up regulations listed here (12)
I believe the answer is:
constitution
'make-up' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for constitution that I've seen before include "make-up" , "State of health; composition" , "legal system" , "set of rules and regulations" , "Body of principles governing a state" .)