This is definitely not the case. As an example, the Official Standard way to encode data structures in the 90s was ASN.1 from the ITU. Problem is, ASN.1 kinda sucked and so nobody uses it anymore outside of cryptography. Then the Official Standard became XML. Eventually people decided that also wasn't that great and switched to JSON, which is a totally unofficial standard defined by one guy.
Your approach / the EU approach would mean REST APIs would all need to be encoded with ASN.1 or XML.