(a) Any person driving a commercial motor vehicle who is requested by a police officer, pursuant to Section 6-516, to submit to a chemical test or tests to determine the alcohol concentration or any amount of a drug, substance, or compound resulting from the unlawful use or consumption of cannabis listed in the Cannabis Control Act, a controlled substance listed in the Illinois Controlled Substances Act, an intoxicating compound listed in the Use of Intoxicating Compounds Act, or methamphetamine as listed in the Methamphetamine Control and Community Protection Act in such person's system, must be warned by the police officer requesting the test or tests that a refusal to submit to the test or tests will result in that person being immediately placed out-of-service for a period of 24 hours and being disqualified from operating a commercial motor vehicle for a period of not less than 12 months; the person shall also be warned that if such person submits to testing which discloses an alcohol concentration of greater than 0.00 but less than 0.04 or any amount of a drug, substance, or compound in such person's blood, other bodily substance, or urine resulting from the unlawful use or consumption of cannabis listed in the Cannabis Control Act, a controlled substance listed in the Illinois Controlled Substances Act, an intoxicating compound listed in the Use of Intoxicating Compounds Act, or methamphetamine as listed in the Methamphetamine Control and Community Protection Act, such person shall be placed immediately out-of-service for a period of 24 hours; if the person submits to testing which discloses an alcohol concentration of 0.04 or more or any amount of a drug, substance, or compound in such person's blood, other bodily substance, or urine resulting from the unlawful use or consumption of cannabis listed in the Cannabis Control Act, a controlled substance listed in the Illinois Controlled Substances Act, an intoxicating compound listed in the Use of Intoxicating Compounds Act, or methamphetamine as listed in the Methamphetamine Control and Community Protection Act, such person shall be placed immediately out-of-service and disqualified from driving a commercial motor vehicle for a period of at least 12 months; also the person shall be warned that if such testing discloses an alcohol concentration of 0.08, or more or any amount of a drug, substance, or compound in such person's blood, other bodily substance, or urine resulting from the unlawful use or consumption of cannabis listed in the Cannabis Control Act, a controlled substance listed in the Illinois Controlled Substances Act, an intoxicating compound listed in the Use of Intoxicating Compounds Act, or methamphetamine as listed in the Methamphetamine Control and Community Protection Act, in addition to the person being immediately placed out-of-service and disqualified for 12 months as provided in this UCDLA, the results of such testing shall also be admissible in prosecutions for violations of Section 11-501 of this Code, or similar violations of local ordinances, however, such results shall not be used to impose any driving sanctions pursuant to Section 11-501.1 of this Code. The person shall also be warned that any disqualification imposed pursuant to this Section, shall be for life for any such offense or refusal, or combination thereof; including a conviction for violating Section 11-501 while driving a commercial motor vehicle, or similar provisions of local ordinances, committed a second time involving separate incidents.
A person requested to submit to a test shall also acknowledge, in writing, receipt of the warning required under this Section. If the person refuses to acknowledge receipt of the warning, the police officer shall make a written notation on the warning that the person refused to sign the warning. A person's refusal to sign the warning shall not be evidence that the person was not read the warning.