[address-policy-wg] Announcing address resources

Apropos of, oh I don't know, the weather or the phase of the moon or something, could someone point me to the RIPE policy which says that if you're assigned address resources from the RIPE NCC, that they cannot be announced from outside the RIPE NCC service region? [This is a genuine request, btw. I've been flicking down through RIPE policies for an hour or two today and can't find the reference.] Nick