The last six months or so have seen a trickle of activity in AV regulation at multiple jurisdictional levels: state, country and international. We may never see a flood, but a steady stream would be very useful to everyone involved in developing and deploying AVs. What we have so far deserves a review.
The latest event was the announcement of the ISO 22737 standard for L4, limited to low-speed autonomous driving (LSAD). I think it is significant that we have a first ISO standard at the L4 level.
The LSAD regulation follows the German announcement in late May 2021 that includes some L4 use-cases. France quickly followed with its own AV regulation. There are also AV regulations brewing in several other countries.
The next table summarizes most of the AV-related regulation activities I could find. More information is available below the table. There are other countries that are working on AV regulation that are not included in this column.