Is there anything on the employment app of Company B that mentions drug test?

Did you notice any form of signage (ie "We Are Proud To Be A Drug-Free Workplace", or "Drugs Dont Work Here", etc) tacked on the walls/bulletin boards of Company B?
Burnt Toast Reviewed by Burnt Toast on . Any Insight? I find myself in a unique position. Company "A" has made a job offer, (I accepted) - conditional upon completing drug screen (5-panel NON-DOT), hearing and vision (baseline) testing. Company "B" has made an offer as well (also accepted), have been given a start date with out any mention of a drug test or anything. What is the chance that Company "B" will spring a test on the first day (or week). Is it legal? Both companies knew that I had multiple offers. BTW, I live in Illinois. Rating: 5