I obviously cannot speak for you, but at the time DT-F was convened, I understood that issues such as software systems and critical operational procedures for any of IANA's activities had to have a "backstop", as we were then calling NTIA's involvement, and that was what we were discussing. Yes, each of the other communities COULD set up a similar multi-expert body and IANA could consult with any or all of them as appropriate, but there did not seem to be much value in that. Alan At 08/05/2016 10:00 PM, Mueller, Milton L wrote:

MM: We created the committee because someone said, "suppose there is a need to make a major change in RZ operations comparable to DNSSEC. Where does the authority to do that lie?" We discovered that, absent NTIA, there was no clear institutional locus for initiating or approving those kinds of changes. So we created this committee for that very limited purpose. It was never conceived as a replacement for ALL of NTIA's roles.