A building where criminal are kept is a building, jail, or holding facility.
Hi there! In this particular story and in general, the word finicky means means fussy.
Some synonyms could be overparticular, a certain standard, etc.
Hope this helps! Have a good day!
Answer:
It is any basic principle that should be followed to ensure success in general or in a particular activity.
Example: The golden rule in math class is to always show your work.