The governor will sign the legalization measure at a ceremony on the city’s West Side.
Under the legislation approved by lawmakers last month, starting next year, marijuana will be legal for recreational use for Illinois residents and visitors who are 21 years old and over.
The law would allow Illinois residents to buy up to 30 grams of marijuana at a time. Non-residents could have up to 15 grams.
Medical marijuana patients also would be allowed to grow up to five plants at home for their personal use.
In addition to standard state and local taxes, the state would impose a 10% tax on all marijuana products with up to 35% THC, the chemical that gets marijuana users high. Marijuana products with THC concentrations of more than 35% would be taxed at…