The Ferengi Trade By-Laws were an extensive set of economic guidelines and regulations that governed every aspect of business activities within Ferengi society. These included actions such as the purchase of a business license, bidding on the Ferengi Futures Exchange and the proper way of tending a bribe to a Sub-nagus. (DS9 module: Star Trek: Deep Space Nine Narrator's Toolkit) In 2371, Brunt and the Ferengi Commerce Authority charged Quark with violating the Ferengi Trade By-Laws for not knowing that his mother Ishka had been earning profit. (DS9 episode: "Family Business")