Ill. Admin. Code tit. 11, § 508.10
c) The abuse of chemical substance has become an increasing problem in modern society and could involve upwards of 10% of the total population. In racing, as with other sports, the problem of drugs is two-fold:
f) Part 508 rules provide a systematic administrative framework for the prevention of alcohol and drug abuse by participants in racing. This part provides for the collection of body fluids and their testing for the presence of controlled substances. Additionally, this part will provide a framework for the testing of drivers/jockeys for the presence of alcohol.
Part 508 also provides a framework to insure that individuals who are found to abuse alcohol or drugs will seek rehabilitation.