(a)
The model year of initial applicability is indicated by the last two digits of the six-digit group of the section number. A section remains in effect for subsequent model years until it is superseded.
(b)
A section reference without a model year suffix shall be interpreted to be a reference to the section applicable to the appropriate model year.
Code of Federal Regulations
[62 FR 31242, June 6, 1997. Redesignated at 63 FR 967, Jan. 7, 1998]