I don't know if this has changed in the last few years, but I was working from the September 2005 edition of the East Kingdom policies and procedures for local chroniclers, which says:

E. 3. Frequency: The primary responsibility of a local chronicler is the production of a useful newsletter for their group. It may appear as often as they and the group deem useful, with quarterly being the minimal acceptable frequency.

So yes, at least within the East, local groups are (or were) required to publish a newsletter at least quarterly.