14 Ill. Adm. Code 475.420
Buy-Down Rate
Section 475
Section 475.420 Buy-Down
Rate
a) It is an unfair or deceptive act to advertise the sale of any
motor vehicle at a "buy-down" rate, as that term is defined in
Section 475.110, without clearly and conspicuously disclosing in the
advertisement that the interest rate is not exclusively sponsored or subsidized
by the manufacturer, if such is, in fact, true.
"Manufacturer"
includes any subsidiaries of the manufacturer that advertise or offer motor
vehicle financing.
b) It is an unfair or deceptive act to advertise or offer below
market finance rates, unless the advertised "buy-down" rate complies
with the Federal Truth In Lending Act.