The Internet Corporation for Assigned Names and Numbers (“ICANN”) has implemented an ambitious programme to expand the domain name system. The programme will make available new generic-Top-Level-Domain names (“gTLDs”). New gTLDs, the letters after the last dot in a web address (i.e. ), will be available to applicants able to meet ICANN’s demanding application requirements. As part of the expansion, ICANN has drafted a guidebook (“AGB”) providing the rules and standards for obtaining a new gTLD. The AGB includes dispute resolution measures aimed at protecting parties with existing legal rights in the expansion process. The following paper considers the dispute resolution systems in the AGB for objecting to or blocking new gTLDs. The AGB contains systems for resolving disputes prior to the launch of a gTLD, and after a gTLD has been issued. The focus of this article is largely on the rights of parties to challenge new gTLDs during the application process, prior to delegation or “launch” of a new gTLD.