I can't figure out UCC either. There are dozens of references to that set of letters for calls,meetings,etc. Uniroyal Chemical Company IS Chemtura though.
Seems real close to Committee of Unsecured Creditors.
They were taking meetings and had involvement with UCC as far back as early April and the more I read the invoices the more it seems that it is an entity that is not an asset but involved with Lazard in financial matters to some extent.