Documents and other reference codes - Box 44

Hello
I am curious why for CHIEF… there are 256 document codes from gov.uk
For CDS
There are 414 in Appx 5a - Table 1
and 46 in Table 3.

Is CHIEF : document, certificate and authorisation codes, download - missing these codes ?

Cheers
Chris

Many EU codes that were never enabled on CHIEF are valid for CDS, because it’s using UCC not SAD rules.

Thank you very much for your reply.