Change 378183 had a related patch set uploaded (by Catrope; owner: Catrope):
[operations/mediawiki-config@master] Give sysops the flow-create-board right on all wikis with Flow in general use

https://gerrit.wikimedia.org/r/378183

My patch adds the following logic to the Flow config: if the Flow beta feature is enabled, or Flow occupies one or more entire namespaces, then give sysops the flow-create-board right.

Change 378183 merged by jenkins-bot:
[operations/mediawiki-config@master] Give sysops the flow-create-board right on all wikis with Flow in general use

https://gerrit.wikimedia.org/r/378183

Mentioned in SAL (#wikimedia-operations) [2017-09-14T23:27:35Z] <catrope@tin> Synchronized wmf-config/InitialiseSettings.php: Give sysops the flow-create-board right on Flow wikis (T175934) (duration: 00m 45s)

Mentioned in SAL (#wikimedia-operations) [2017-09-14T23:29:16Z] <catrope@tin> Synchronized wmf-config/CommonSettings.php: Give sysops the flow-create-board right on Flow wikis (T175934) (duration: 00m 45s)

https://www.wikidata.org/wiki/Special:ListGroupRights#sysop now lists flow-create-board

Works in betalabs - if users belongs to Administrators (or was just granted Administrators rights), they can create, move, delete SD boards.

flow-create-board right is a part of Administrators rights.