More than 10,000 of Iowa’s public university students this fall came from Illinois — making that state second only to Iowa in feeding the enrollment pipelines of three public universities. In less than a week, recreational marijuana will be legal in Illinois for residents and visitors alike, while its possession and sale remain illegal in Iowa, the Cedar Rapids Gazette reports. College representatives are stressing that marijuana sale and possession remain illegal, but some observers say more clarity is needed in how Iowa universities will address students caught with possession of items legal across the state border.