ABYC E-9
Direct-Current (DC) Electrical Systems on Boats
Published by American Boat and Yacht Council (ABYC)
The CFR incorporates ABYC E-9 by reference, which makes the edition it names part of the regulation. The CFR requires the edition it names, which may not be the newest. To enforce any other edition, the agency must publish the change in the Federal Register.
The 3 editions the CFR requires
Different parts name different editions; each applies where its part says so. Newest first.
ABYC E-9 (1990)
As the CFR lists it: “E-9-1990—Direct-Current (DC) Electrical Systems on Boats”
- Listed in 46 CFR 125.180(f)(5); required by46 CFR 129.120 ↗
ABYC E-9, May 28, 1990
As the CFR lists it: “E-9, Direct Current (DC) Electrical Systems on Boats (May 28, 1990) (“ABYC E-9”)”
ABYC E-9 (1981)
As the CFR lists it: “E-9-1981—Recommended Practices and Standards Covering Direct Current (DC) Electrical Systems on Boats”
- Listed in 46 CFR 28.40; required by46 CFR 28.345 ↗
How to read it
- Where to get itABYC standards ↗
A free or purchased copy may not be the edition the CFR names; check it against the edition above. Every incorporated standard can also be inspected at the National Archives (NARA) and at the agency named in the section that lists it.
ABYC E-9 is copyrighted by its publisher; RegKnot shows its title and the editions the CFR names, not its text. Read from the eCFR's incorporation-by-reference sections, current as of October 26, 2026. The regulation text governs. All standards the CFR requires.