That change seems poised to arrive. In an agreement hailed by both sides that negotiated it — brewers and distributors — an updated law is expected to come before the Illinois General Assembly this week that clears up a patchwork of rules that brewers have long criticized as stymieing growth and innovation. The new legislation would allow a brewer to make 120,000 barrels of beer per year — well more than almost every brewery in Chicago — while operating as many as three retail facilities, such as brewpubs and taprooms. Current law, which has been cobbled together over years of negotiations, limits brewers to 30,000 barrels of production if they own multiple types of breweries.