92 Ill. Adm. Code 2100.100
General Maintenance Requirements
Section 2100
Section 2100.100 General
Maintenance Requirements
a) Each motor carrier of passengers shall maintain, at its
principal place of business in Illinois, records of all revenues, expenses,
service, and related transactions (such as the retirement, trade, or sale of
equipment or other property or contingent liabilities due to accidents or
losses) relating to its Illinois intrastate operation, except as provided in
Section 2100.101.
b) Such records shall be kept for a period of three (3) years
after the event recorded therein.