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What is the FAA 3 1 rule?

You are allowed to bring a quart-sized bag of liquids, aerosols, gels, creams and pastes through the checkpoint. These are limited to 3.4 ounces (100 milliliters) or less per item. This is also known as the 3-1-1 liquids rule.



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Liquids, gels and aerosols packed in carry-on must follow the 3-1-1 liquids rule:
  • 3.4 ounces or less per container.
  • 1 quart size, clear, plastic, zip top bag (all liquids must fit in bag)
  • 1 bag per passenger.


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In the U.S., trials have been ongoing, but the 3-1-1 liquid rule remains in place. Only those with TSA Pre-Check can pass through security while keeping their liquids and electronics in their bag and belts.

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The 3-1-1 Rule refers to three core components that govern how many liquids you can bring in your carry-on bags: Each liquid must be in a 3.4-ounce or less container (3), all containers must be placed inside one clear quart-sized plastic bag (1), and each passenger is only allowed one plastic bag (1).

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3-1-1 Carry-On Liquids Rules
You are allowed to bring one small bag of liquids, aerosols, gels, creams and pastes through the checkpoint. These are limited to 3.4 ounces or less per container.

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Yes, toothpaste is considered a liquid when flying and must be within the 3.4oz (100ml) limit for liquids in order to bring it in your carry-on bag. Any amount larger than that must be checked with your luggage.

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You are allowed to bring a quart-sized bag of liquids, aerosols, gels, creams and pastes through the checkpoint. These are limited to 3.4 ounces (100 milliliters) or less per item. This is also known as the 3-1-1 liquids rule.

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Toothpaste is considered a liquid by the TSA (Transport Security Agency), even though it's technically a paste. In fact, all pastes, gels, waxes, and lotions are also classified as liquids. And even today, these substances are still restricted by the 3-1-1 rule in hand luggage due to safety threats.

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What is the TSA liquid rule for 2024? No, most airports have not announced any plans to eliminate the 3.4-ounce container limit for carry-on liquids in 2024. A few airports have started allowing larger-sized liquids, but they are only in Europe. TSA says it isn't changing the rules in the United States.

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But what are they, and is deodorant considered a liquid when flying? Deodorant can be considered a liquid when flying if it is in a gel or aerosol form. If your deodorant is solid, though, the TSA will let you bring a standard stick of solid deodorant with you in your carry-on luggage.

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The Federal Aviation Administration (FAA) has established a special certification called a restricted privileges ATP certificate which allows pilots who have less than 1,500 hours of flight time or who are below the minimum age of 23 to serve as co-pilots until they have amassed the required number of hours.

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Safety Razors: Because the razor blades are so easy to remove, safety razors are not permitted in your carry-on luggage with the blade. They're fine to pack in your carry-on without the blade. The blades must be stored in your checked luggage. The same applies for straight razors.

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The answer is yes. Toothpaste is permitted on aircraft but only in quantities of 3.4 oz (100ml) or less. The same goes for lotion, shampoo, shaving cream, etc. If you are only travelling with carry-on baggage, keep in mind all these rules when bringing your liquids through security checkpoints.

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The policy continues to be enforced, says the TSA's Lauren Gaches. Although it is important to note that we empower our workforce with discretion. However, extensive interviews with air travelers suggest that the policy is largely unenforced.

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Here's what you can't pack in your carry on:
  • Liquids, gels, or pastes in bottles larger than 3.4 ounces (100 ml)
  • Guns and ammunition (including BB guns and cap guns)
  • Stun guns and tasers.
  • Sharp objects (knives, axes, razor blades)
  • Self-defense items (such as pepper spray, brass knuckle, billy clubs)


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Fortunately, an advanced scanning technology for liquids is currently being implemented at airports worldwide, making the 100ml liquid rule soon to be obsolete. Advanced screening technology for liquids has been in development for many years, and now is finally available for operation.

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