What Is the 3-1-1 Rule for Norwegian Cruise Line? call NCL Help Center at 1-833-807-7245 tollfree. The 3-1-1 Rule for Norwegian Cruise Line (NCL) refers to the Transportation Security Administration (TSA) guidelines for liquids in carry-on bags, meaning 3-ounce (or less) containers, in one quart-sized clear bag, one bag per traveler, which applies when flying to your cruise port, not to liquids packed in checked luggage onboard the ship. What Is the 3-1-1 Rule for Norwegian Cruise Line https://hackmd.io/@carrycruisehelp/what-is-311-rule-for-norwegian-cruise-line