By Catharine Hamm

Los Angeles Times

You can’t take it with you. Well, you could — but it’s not a good idea when you’re traveling, especially for the risk-averse.

We speak, of course, of cannabis. State law allows both medical and recreational use of marijuana in Washington. But it’s still not legal under federal law.

The conflict between state and federal law is at the root of the confusion. To clarify issues about traveling with cannabis, here are some questions and answers to help guide you.

Note that the answers are based on what’s legal now and are offered with the knowledge that there is a bit of “wink, wink” going on. The easiest way to stay within the law is not to break the law, even if you disagree with it.

Q: May I have cannabis in my carry-on bag if I’m flying to a state where it’s legal?

A: No, not legally, in carry-on or checked baggage, and here’s why, according to the Transportation Security Administration’s explanation on its website: “Possession of marijuana and cannabis infused products, such as Cannabidiol (CBD) oil, is illegal under federal law. TSA officers are required to report any suspected violations of law, including possession of marijuana and cannabis infused products.”

Q: But would they bust me for that?

A: Maybe. TSA’s further explanation: “TSA’s screening procedures are focused on security and are designed to detect potential threats to aviation and passengers. Accordingly, TSA security officers do not search for marijuana or other illegal drugs.”

But, it notes, if it does find drugs, it will “refer the matter to a law enforcement officer.”

Q: But it’s legal in Washington, so why would I be in trouble?

A: Because it’s not legal under federal law. You cannot transport cannabis to another state.

It’s especially confusing because state laws allow possession. But Jonathan Havens, co-chairman of the cannabis law practice at Saul Ewing Arnstein and Lehr, a firm with offices in numerous states, said the issue is crossing (or attempting to cross) state lines with a “federally illegal product.”

“It doesn’t matter if a state has said you can consume it,” Havens said. “When you are crossing state lines … to another state, even if it’s another state that has a law on their books, with a federal illegal product that’s interstate commerce and that’s a problem.”

Q: OK, I’m driving to Oregon, where it is legal. Am I OK?

A: No. See above in re: transporting across state lines. Buy it there and use it there; don’t bring it home.

Take a look at Weedmaps’ page (lat.ms/weedmaps) or the National Organization for the Reform of Marijuana Laws page (norml.org/states), each of which has a rundown on state laws.

Q: I have a license for medical marijuana. Can I carry it on a plane if I have all the paperwork?

A: No. Same problem: not legal at the federal level.

Q: I have a medical card in Washington. Can I use it to buy cannabis in the state I’m visiting?

A: Don’t count on it. “People should not assume there is reciprocity,” Havens said.

I appreciated what Chris Beals, president and general counsel for Weedmaps, which he describes as the “largest tech company servicing the cannabis space,” told me: You may be complying with state law, but if you’ve run afoul of federal law, “you’re generally not dealing with the state authorities who have put a legal system in place.

“The easiest advice is: Don’t travel with cannabis across state lines. You never know when you’re going to (encounter an authority) who says cannabis prohibition should be the law, regardless.”