http://www.open-std.org/ is the site that maintains lots of documents for the Joint Technical Committee ISO/IEC JTC 1.

Historically both ISO and the IEC worked on IT standards. But obviously it's no good if there's an ISO international standard for how to encode the letter 'A' as binary data and a separate IEC standard for how to do it. In the best case this is pointless duplication of effort (these are international standards groups, every country is ultimately involved) and in the worst case they diverge and there's actual conflict, defying the purpose of standardization. So, the Joint Technical Committee does work on this intersection on behalf of both IEC and ISO.

Now, the importance of these standards to everybody means it certainly can be argued that the site must remain forever accessible to those without HTTPS but it's hard to think of any reason to just not implement HTTPS at all...