The TREx Service covers a bundle of TLDs as a package and cannot be divided.
The dust from the New gTLD Program has settled, and with the struggles of the program's awareness and tepid response, many trademarked terms are exposed in the expanded Internet ecosystem. For a selection of domains, TMCH created TREx as a cost-effective solution for trademark holders to protect their intellectual property.
Similar to the DPML blocking mechanism, the service is only applicable for sunrise eligible TMCH trademark records. The good news is coverage will grow as additional TLD's are added each year. Further these will not be limited to new gTLDs, but also include ccTLDs and legacy TLDs.
Coverage only extends to names not registered prior to the service activation, and names that are premium-priced or reserved for registration at the registry level are exempted. The service will inform you of the applicable coverage before opting in.