40 CFR § 1048.10 - How is this part organized?
This part 1048 is divided into the following subparts:
(a) Subpart A of this part defines the applicability of part 1048 and gives an overview of regulatory requirements.
(b) Subpart B of this part describes the emission standards and other requirements that must be met to certify engines under this part. Note that § 1048.145 discusses certain interim requirements and compliance provisions that apply only for a limited time.
(c) Subpart C of this part describes how to apply for a certificate of conformity.
(e) Subpart E of this part describes general provisions for testing in-use engines.
(g) Subpart G of this part and 40 CFR part 1068 describe requirements, prohibitions, and other provisions that apply to engine manufacturers, equipment manufacturers, owners, operators, rebuilders, and all others.