Overview:
Until "Create (from UI) of Shared "Instance" records on Central/Member tenants" functional is not ready, we cannot fully test following feature from user perspective:

Derive new local MARC bib record from Shared Instance record.
This feature has the following stories to be tested:
UIIN-2496 Derive new Shared MARC bib record from Shared Instance in Central tenant
UIQM-480 Derive new local MARC bib record from Shared Instance record.

 quickMARC & MARC authority UI changes needed for ECS
This feature has the following stories to be tested:
UIQM-483 - Add "Local" or "Shared" to flag MARC bib records
UIMARCAUTH-268 - Add "Local" or "Shared" to flag MARC authorities

 Search/Browse Shared MARC authorities
Following to be tested in this feature:
UISAUTCOMP-63 Add MARC authority Search facet for shared vs Local authority records
UIPFAUTH-68 Update authority plugin filters to include Shared Facet
UIMARCAUTH-298 Add Shared icon to MARC authority search results
UIPFAUTH-74 - CLONE - Add Shared icon to Find authority plugin search results
UIMARCAUTH-267 Ability to search/browse Shared authorities and see number of linked titles

Probably after and done, QAs will be able to test following feature from user perspective: