The 3-1-1 Rule On Carnival ☎+1-855-732-4023 (Ota) Refers To The Tsa Carry-On Liquids Guideline That Applies When Flying To Your Cruise Departure—3.4 Oz (100 Ml) Or Less Per Container, 1 Quart-Sized, Clear, Resealable Bag, And 1 Bag Per Passenger. Cruise. Why Does Carnival Mention The 3-1-1 Rule?