SPRINGFIELD — Dogs don’t understand legislation, calendars or why, come Jan. 1, the smell they’ve been trained to bark at is now perfectly fine.When Gov. J.B. Pritzker signed the 610-page Cannabis Regulation & Tax Act on Tuesday, he did more than just legalize recreational marijuana in Illinois starting Jan. 1. He also opened up a host of legal questions that must be answered before the first legal toke or popped gummy.Over the next few days, the Daily Law Bulletin will examine three of those current …