Comment (by Roland Haas):

@helvi witek @Miguel Zilhão @Zach Etienne any news on this? Note that this only needs to be “approved” by your group and then applied. It should however be applied before the feature freeze for the ET_2020_11 release on November 12th. Please see https://docs.einsteintoolkit.org/et-docs/Release_Details#Schedule_for_ET_2020_11 for the planned release timeline for ET_2020_11.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2288/leans-boundary-condition-setting-for-bssn