[arin-ppml] Prop-151: Limiting needs requirements for IPv4 transfers

[Eric Brunner-Williams]

> No party that has received resources from ARIN or via transfer within the
> preceding 12 months shall be allowed to act as a source for a transfer.
> 
> OR
> 
> No party which has acted as a source for a transfer within the preceding
> 12 months shall be permitted to receive resources from ARIN or via transfer.

Both assume that the address space acquired (or surrendered) is
equivalent to the address space to be surrendered (or acquired).

Seeking a /xx and offering a /yy, where there are many more bits in
the /yy, doesn't seem to be inherently bad, or supporting a repeated
acquisition and subsequent resale, if the /yy wasn't in the /xx, or
the sum of all /yys in a metering period is less than the /xx sought.

Short form: address blocks are not fungible, so rules should
distinguish between things that are like, and things that are unlike.

Eric