AC/DC:
The presence of a main breaker does not determine where the NEC begins.
Look carefully at article 90 and the definitions in 100 service point. The NEC clearly applies to the goose neck or weather head and your service entrance SE cable (or conduit) to the meter base and the meterbase.
Or your service lateral and meterbase.
And even if your state sees does it different you need to look up your utility specs.
Here in upstate NY National Grid pulls in the latest 2023 NEC, when our state is on the 2017:
"2.3.2 Codes, Standards and Wiring Adequacy
The Customer’s electric service equipment and its installation shall conform to the requirements of the
latest edition of the National Electrical Code, all applicable local ordinances and building codes, in
addition to the Company requirements and specifications stated herein"
Source: