The first legislative hearing on a pair of legal marijuana proposals will be held at 12 p.m. today at the Bilandic Building. Among those testifying will be Barbara Brohl, executive director for the revenue department in Colorado — where marijuana is already legal — and Karmen Hanson, program director for health at the National Conference of State Legislatures. The meeting will be live-streamed on the Illinois General Assembly Senate and House webpages.