Jim, Daniel, I like the idea of the NCC (specifically RIPE Labs) just allocating to themselves a small block of v4 and another of v6 for experiments, and then delegating portions or the whole of the block for bounded experiments, keeping the paperwork and process to a minimum. Also, RIPE could perhaps extort a good talk out of the researchers once the results are published ;-) If someone needs a big block or a long period of time, perhaps that is something to discuss on its own, consulting people the IAB. One question I have about Randy’s proposal is the business about returning the addresses as clean or cleaner. That should be elaborated. Withdrawn routes? Sure. Worrying about reputational damage after security research or what’s in other people’s configs? Nah. Also- what does it mean re ROAs? Eliot