(2021-06-10, 17:09)Travis Cobbs Wrote: The BFC CERTIFY line must be before any geometry line in the file. As far as I know, that's the only requirement for it. Line types 1-5 all count as geometry lines. Having said that, I don't know the rules for the header as a whole. If you plan to submit a file to the parts tracker, you'll have to learn those rules yourself.
I am not submitting them, but others may want to use them. Who is in charge of the parts tracker?