rule book
nounDefinition of rule book
: a book that contains the official set of rules that must be followed in a game, job, etc.
always carries the rule book in his back pocket to every game
also
: the rules in such a book
The rule book says that once the puck fully crosses the line it is a goal.
—often used figuratively He's a maverick when it comes to decorating, throwing away the rule book.