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The Working Group note in this Google Doc[1] provides details of these discussions.
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The Working Group believes that the exact match criteria has already struck the proper balance of deterring bad-faith registrations but not good-faith domain name applications. The proper balance can be enhanced by a well-crafted Claims Notice that appropriately notifies prospective registrants about a potential problem with their chosen domain name, employs clear/concise/informative language, and avoids a potential overflow of false positives. Therefore, instead of proposing any changes to the matching criteria for the Claims Notice, the Working Group proposed Trademark Claims Recommendation #1 above.
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[1] https://docs.google.com/document/d/10quBC1BnuIM_wOyEXH7TttNWEOrDTiPNscgSBd7QFXg/edit?usp=sharing