You said it’s not runtime type checking but then switched to “strict type checking” - those aren’t the same. Other person has it right, it has runtime type checking. The type checking happens when running your code. I don’t think that’s particularly useful, it’s pretty much sugar on top of what would throw an error anyway.

Here you go: It’s vs its https://www.grammarly.com/blog/commonly-confused-words/its-vs-its/

As far as I could tell it’s this: US Cyber Trust Mark It seems like it’s for IoT devices? I couldn’t find what the actual requirements are in my 5 minutes of searching.

Starts in 2027, depending on point 3.