46 CFR §52.01-2

1. (a)Main power boilers and auxiliary boilers must be designed, constructed, inspected, tested, and stamped in accordance with Section I of the ASME BPVC (incorporated by reference; see § 52.01-1), as limited, modified, or replaced by specific requirements in this part. The appendices to Section I of the ASME BPVC are adopted and must be followed when the requirements in Section I make them mandatory. For general information, table 1 to § 52.01-2(a) lists the various paragraphs in Section I of the ASME BPVC that are limited, modified, or replaced by regulations in this part.
2. (b)References to the ASME BPVC, such as paragraph PG-1, indicate:
   1. (1)P=Section I, Power Boilers.
   2. (2)G=Subsection—General Requirements.
   3. (3)1=Paragraph 1.
3. (c)When a section or paragraph of the regulations in this part relates to Section I of the ASME BPVC, the relationship with the code will be shown immediately following the heading of the section or at the beginning of the paragraph as follows:
   1. (1)(Modifies P __.) This indicates that the material in P __ is generally applicable but is being altered, amplified, or augmented.
   2. (2)(Replaces P __.) This indicates that P __ does not apply.
   3. (3)(Reproduces P __.) This indicates that P __ is being identically reproduced for convenience, not for emphasis.