> These codes are often produced by a single organization, "International Code Council"

Somewhat off-topic, but I've never quite understood the American tendency to call something the "International X" when the US is only the country of any significance involved in it.

(It may be technically true that a handful of small countries have adopted the US building code – such as Bermuda or Western Samoa. But that doesn't change its status as an essentially American code. The US is the only major economy to use it, and non-US entities have very minimal, if any, input on its contents. And a few small countries might have adopted the US building code even if it was called "US" rather than "International".)