Ill. Admin. Code tit. 44, § 5040.430
Warranty work shall be performed by a CMS garage or in a manufacturer's authorized service center as directed by CMS. In determining whether the work should be done in-house, DOV shall consider the effect on the State garage, State garage capabilities, location of the vehicle and other such factors.
(Source: Amended at 38 Ill. Reg. 16839, effective July 25, 2014)