You don't have to create the domain, you can create the delegation within the
uscc.com zone, as you have above. The
uscc.com zone presumably has an SOA record (not shown above), and you're really delegating the zone
gtm.newsimota.prov.uscc.com. I don't know if the CNAME of
newsimota-prov.uscc.com to
gtm.newismota.prov.uscc.com will work as you want, though. You'd have to test. But the delegation of
gtm.newsimota.prov.uscc.com should work.
If you are concerned with traffic interruption, I suggest you run tests with some other non-production domains so you are comfortable with how delegation works... Particularly with that CNAME, which I suspect will only work for that hostname (rather than the whole domain), but again, you'll need to test.
Cheers,
Bill