Apparently the standard has been updated and the old solar film doesn't pass, it's not far off spec though but rules are rules.
ISO 12312-2:2015 looks like you have to buy a copy here.
This is a brand-new worldwide standard, introduced in June 2015, which supersedes all previous standards, and pertains specifically to filter material intended for eye protection during direct solar viewing
https://www.eclipse-chasers.com/arti...%20Filters.pdf