[anti-abuse-wg] The Rules

I am going to try to work with Brian, off-list, to try to wordsmith and do whatever else is necessary in order to convert the informal proposals that I posted here recently into formal ones. While I am working on that however, I would very much like to ask a very simple question... What exactly are The Rules with respect to IPv4 address block allocations? What does one need to show, exactly, in order to either get or, more importantly, to keep, say, a /21 ? Assume for the sake of argument that I received a /21 from some RIPE LiR one year ago. Assume that I never put _anything_ in it. Assume that RIPE NCC "audits" me. What happens, exactly? Regards, rfg