LINCOLN, Neb. (AP) — Votes by Omaha Tribe members are encouraging tribal leaders to continue looking into the marijuana business and allowing recreational use on its northeast Nebraska reservation.

Voters overwhelmingly approved measures Tuesday regarding recreational use, medicinal use and a proposal to grow industrial hemp. The referendum votes merely provide guidance. The Tribal Council will make the final decision.

Indian tribal law expert Lance Morgan has said a Just Department memo issued last year on the subject doesn’t actually let tribes legalize marijuana. Rather, it lets them work with U.S. attorneys, and Morgan says U.S. attorneys in many states have been unwilling to let tribes move forward.

A spokesman for the U.S. attorney in Nebraska didn’t immediately return a call Wednesday from The Associated Press.