[dns-operations] Dumb question: why is it that some registries limit the nameservers that can be delegated to?

[Stephane Bortzmeyer]

On Thu, Sep 11, 2014 at 03:06:11PM +0000,
 Michele Neylon - Blacknight <michele at blacknight.com> wrote 
 a message of 66 lines which said:

> For gTLDs the nameservers have to be registered via a registrar

Indeed. For most registries (those with a ICANN TLD), the most common
answer is probably "because ICANN requires so and this is not
negotiable".