“The Laws” sounds awfully intimidating, but all games have laws, though they usually call them “Rules” or “The Official Rules” — Scrabble, chess, golf, football…, they all have rules.
There is a little book called the “Laws of Duplicate Bridge” which is our rule book. We often just refer to it as “The Laws”. It was first published in 1928 as “The Laws of Duplicate Contract Bridge”. It gets revised every few years. For the last few editions, that has been about every 10 years.