[buescher]

This is all good information. I'd only add:

You left out Canada. IC certs are kind of a pain because some of their rules are very slightly different plus you need a representative in Canada.

UL standards can be read (but not downloaded) for free on UL's standard store. These don't include IEC standards adopted by UL, but do include national differences for those standards for the US.

The specific procedures your test lab will use in the US for typical part 15 devices include procedures covered by ANSI C63.4 (unintentional radiators) and C63.10 (intentional radiators). These you can't get from the Estonians. You probably won't need them but they can be helpful if you get serious about pre-compliance testing or if you are puzzled by what the lab is doing. IEC CISPR standards overlap here. There is a list of measurement procedures on the FCC web site: https://www.fcc.gov/general/equipment-authorization-measurem...

You should have an engineer or "directly responsible individual" on site at the test lab during testing for all kinds of reasons, from building capability and understanding of the process to having someone there to clear up any misunderstandings. If you have a consultant do this for you, you or someone from your company should be there also.

For transmitters (intentional radiators) you can look up test reports and submittal information for competing products on the FCC's web site. That's one way to get an idea of what your test requirements and setups will look like. For unintentional radiators, you can find some test reports with a web search - companies are not required to make these public.

[negative_zero]

Excellent additions. Sadly for Canada, some companies I worked with didn't bother because of these differences. "US market is big enough for launching. Maybe we'll come back to Canada later." They rarely did.