For a gasoline boat, the electrical rules a builder must meet are federal law: 33 CFR 183 subpart I. They're shorter than ABYC E-11 and focused on one thing above all: not igniting gasoline vapour.
What it covers
Section 183.401: the subpart "applies to all boats that have gasoline engines, except outboard engines, for electrical generation, mechanical power, or propulsion." Its manufacturer requirements cover ignition protection, grounding, batteries, conductors for circuits under and over 50 volts, ignition secondary circuits, conductor protection and overcurrent protection.
What surveyors check against it
Ignition protection, 183.410. Electrical parts exposed to gasoline vapour must not ignite it, tested in a mixture of 4.25 to 5.25 percent propane. A part is exempt if "the space between the electrical component and the gasoline fuel source is at least two feet and the space is open to the atmosphere." Look for household switches, chargers and inverters fitted in a gasoline engine space.
Overcurrent protection, 183.455. "Each ungrounded current-carrying conductor must be protected by a manually reset, tripfree circuit breaker or fuse." It may be placed within seven inches of the source of power, or within 40 inches if the conductor is in a sheath or enclosure throughout. That's tighter than the 72 inches ABYC E-11 allows in some sheathed cases. See missing battery fuse.
Grounding and batteries, 183.415 and 183.420. Multiple gasoline engines have their cranking circuits connected by a common conductor; batteries are secured and their terminals protected.
Citing it in a finding
"Fit overcurrent protection within seven inches of the battery, 33 CFR 183.455 and ABYC E-11." On a gasoline boat, citing the federal section alongside ABYC tells the owner the requirement is law for the builder, as well as good practice.