Template:M summ 2002 ISDA 5(b)(v)
Pay attention to the interplay between this section and Section 7(a) (Transfer). You should not need to amend Section 7(a) (for example to require equivalence of credit quality of any transferee entity etc., because that is managed by CEUM.
Note also the interrelationship between CEUM and a Ratings Downgrade ATE, should there be one. One can be forgiven for feeling a little ambivalent about CEUM because it is either caught by Ratings Downgrade or, if there is no requirement for a general Ratings Downgrade, insisting on CEUM seems a bit arbitrary (i.e. why do you care about a downgrade as a result of a merger, but not any other ratings downgrade?)