No - the User Representative cannot also be the DAA.
That would be the User Representative.
The User Representative and the DAA are distinct entities. The two roles are not combined. It is possible however for the DAA to delegate much of their responsibility and authority to others who represent them in meetings, collaborations, and review of requests for ATO's. Even if they delegate, they are still ultimately responsible for every ATO, IATO, and DATO that is issued. They can delegate the signing of documents to others but the signatures of such delegated individuals must still be "by direction of" the DAA and if there are problems with a system operating under and ATO, the DAA is still held responsible, in addition to the person they delegated the authority to.
The IAO is not the DAA, but is responsible to the DAA.
78 on youtube, but it is the actual number
Inyasha, Daa Daa Daa, Yumerio Patissiere, Kodocha and lots more
I only know that it has around 47 chapters. On the website I found the information, I couldn't find the volume count, but maybe I overlooked it. Here's the source: http://www.mangareader.net/1577/daa-daa-daa.html
Try searching it in stores
episode 61 is up as far as i know but im not sure about the rest
Ludvig Kristensen Daa died in 1877.
Ludvig Kristensen Daa was born in 1809.
Dennis Daa was born on 1979-07-05.
Dino Daa was born on 1984-02-20.