OLYMPIA, Wash. — Dozens of recreational marijuana businesses in Washington state have received letters from the military telling them that their shops are off limits to all members of the armed forces.

The letters, dated Jan. 21, say that military personnel will be prohibited from entering the business indefinitely unless the business owner agrees to stop selling "substances similar to marijuana."

The letter states that businesses have 30 days to present evidence to the Armed Forces Disciplinary Control Board at Joint Base Lewis-McChord that the businesses agree to stop selling the substances to military personnel.

However, a military spokesman notes the letters are worded similarly to ones required to be sent to any businesses determined to be harmful to members of the military, and that the onus is on military members to know not to go there, not on the shops.