Originally Posted by
Nile_US
Could you please refer where does it say that? My reading of $6.1.5 definitely doesn't mean that.
The reference is a document with requirements. If an airline wants to obtain an IATA "code", it well have to adhere to the IATA requirements.
I never checked that in detail, though I think, an airline goes into a signed agreement with IATA to obtain an IATA "code" and part of that agreement will be the adoption of the IATA requirements, of which part is laid out in the referred document.