Help: HOWTO buy IP address blocks from ARIN?

[Joshua Judson Rosen]

Anyone here ever been through the process of procuring an IP block
from ARIN?

I'm trying to interpret the requirements they give for an
"end-user initial assignment", which are:

    * provide data demonstrating at least a 25% utilization rate of the
      requested block immediately upon assignment

    * provide data demonstrating at least a 50% utilization rate of the
      requested block within one year

.. and maybe I'm just being dense, but it's not entirely obvious to me
what "utilization rate" actually means here: do they mean "sub-blocks
allocated to specific subnets with some-definition-of-minimal waste",
or do they mean "individual addresses actually, specifically assigned"?


I'm trying to rationalise a /20 block, because I can't seem to
partition the space such that I end up with < 50% allocated immediately
or < 75% allocated over the next year; but if I count up the actual
nodes that I expect to exist on all of my subnets, those counts are
definitely short of both the `25% utilization immediately' and
`50% utilization within one year' figures.

If I'm really supposed to be counting individual addresses
and not summing subnet sizes, what am I likely to be doing wrong here?


-- 
"Don't be afraid to ask (λf.((λx.xx) (λr.f(rr))))."