In section 3.2 of the dir-spec document it says: ``` If the authority _does_ have a descriptor with the same public key, the newly uploaded descriptor is remembered if its publication time is more recent than the most recent old descriptor for that router, and either: - There are non-cosmetic differences between the old descriptor and the new one. - Enough time has passed between the descriptors' publication times. (Currently, 12 hours.) ``` This value of 12 hours was change in [commit cc351578](https://gitweb.torproject.org/tor.git/commit/?id=cc3515780529277a5f9d788e8a256798e5cd144f) to 2 hours. In addition, [a comment](https://gitweb.torproject.org/tor.git/tree/src/feature/nodelist/routerlist.c?id=8096f3b2549971e120fa3869ea9e458fdad313d5#n2925) in the tor code still says 12 hours. This ticket covers two changes: - update the dir-spec to say 2 hours - update a comment in the tor code Will attach two PRs shortly.