While federal law prohibits the possession of marijuana (inclusive of federal airspace,) California’s passage of proposition 64, effective January 1, 2018, allows for individuals 21 years of age or older to possess up to 28.5 grams of marijuana and 8 grams of concentrated marijuana for personal consumption. In accordance with Proposition 64, the Los Angeles Airport Police Department will allow passengers to travel through LAX with up to 28.5 grams of marijuana and 8 grams of concentrated marijuana. However, passengers should be aware that marijuana laws vary state by state and they are encouraged to check the laws of the states in which they plan to travel.~https://www.flylax.com/en/lax-marijuana-policy