1. (a) (1) Under 50 cubic inches engine displacement.

   1. (2) 50 through 100 cubic inches engine displacement.
   2. (3) Over 100 through 140 cubic inches engine displacement.
2. (b) Over 140 through 200 cubic inches engine displacement.
3. (c) Over 200 through 250 cubic inches engine displacement.
4. (d) Over 250 through 300 cubic inches engine displacement.
5. (e) Over 300 through 375 cubic inches engine displacement.
6. (f) Over 375 cubic inches engine displacement.

7. (g) Motor vehicles which because of unusual engine design cannot be classified, for purposes of emissions control, by engine displacement.

   This classification supersedes any other classification system set forth in any previously adopted test procedure.

Motor vehicles and portable or mobile internal combustion engines for which emission control devices will be certified or accredited are divided into the following classifications:

Note: Authority cited: Sections 39600, 39601 and 43000, Health and Safety Code. Reference: Sections 43100, 43101 and 43600, Health and Safety Code.