Medical marijuana became a legal reality in Massachusetts on Jan. 1, 2013, but what that means for the state’s school districts remains a murky question.

The Wayland School Committee’s policy subcommittee, comprised of Barb Fletcher and Beth Butler, is beginning to consider the issue with an eye toward constructing new policy or modifying existing policy to address use of medical marijuana at Wayland’s schools.

“The question is whether or not this medical marijuana falls under the category of medicine rather than illegal drugs,” said Butler, a former judge, as she examined Wayland’s existing policies about drugs, alcohol and tobacco use on campus. “Just because [the state] allowed it, it’s still a federal law.”