As used in this Act:
"Department" means the Department of Human Services
"Eligible individual" means an individual with a substance use disorder, as that term is defined under Section 1-10 of the Substance Use Disorder Act, or an individual with a mental illness as that term is defined under Section 1-129 of the Mental Health and Developmental Disabilities Code, who is in a state of wellness and recovery where there is an abatement of signs and symptoms that characterize active substance use disorder or mental illness and has demonstrated to the qualified employer's satisfaction, pursuant to rules adopted by the Department, that he or she has completed a course of treatment or is currently in receipt of treatment for such substance use disorder or mental illness. A relapse in an individual's state of wellness shall not make the individual ineligible, so long as the individual shows a continued commitment to recovery that aligns with an individual's relapse prevention plan, discharge plan, or recovery plan.
"Qualified employer" means an employer operating within the State that has received a certificate of tax credit from the Department after the Department has determined that the employer:
"Taxpayer" means any individual, corporation, partnership, trust, or other entity subject to the Illinois income tax. For the purposes of this Act, 2 individuals filing a joint return shall be considered one taxpayer.
35 ILCS 50/3-10