The requirement is in line with the European Convention on Human Rights

Honestly, I had no idea that Russia was still even in the ECHR. I thought that when they'd left the Council of Europe in early 2022 that they'd also left the ECHR, but apparently not.

googles

Okay, so they'd withdrawn from European Court of Human Rights jurisdiction later that year too.

https://www.reuters.com/world/europe/russian-parliament-votes-exit-european-court-human-rights-2022-06-07/

LONDON, June 7 (Reuters) - Russia's parliament on Tuesday passed a pair of bills ending the European Court of Human Rights’ jurisdiction in the country, a rupture provoked by Russia's war in Ukraine.

The break removes a legal avenue that Russians, including jailed Kremlin critic Alexei Navalny, have used in the past to raise high-profile cases that had been rejected by national courts.

Normally I associate the ECHR (European Convention on Human Rights) and the ECHR (European Court of Human Rights) pretty closely -- my understanding is that the latter normally deals with decisions regarding the former -- but apparently one can be in the former and still deny jurisdiction to the latter.

The European Court of Human Rights, which enforces the European Convention on Human Rights, is the best known body of the Council of Europe.