According to the news :
https://v1.ru/text/politics/2020/12/02/69593431/
The State Duma plan to adopt
Federal Law N 1012130-7 "On amendments to article 5
of the Federal law" "On the calculation of time" for
Volgograd region by mid-December.
(State Duma plan to pass the Bill in the second and third reading next week - around December 9, 2020)
Thanks. I've also installed the attached further patch to the development repository to adjust the comments in {zone,zone1970}.tab, since Volgograd will be considered MSK+0 once again.