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(Update Feb 26 2013 : Circle ID article about community objections by Don Moody : http://www.circleid.com/posts/20130219_thinking_carefully_about_new_gtld_objections_community_3_of_4/ ) 

Extract from Applicant Guidebook re: Community Objections

 
Section 3.5.4 mentions four tests that will enable a DRSP panel to determine whether there is substantial opposition from a significant portion of the community to which the string may be targeted.
 
For an objection to be successful, the objector must prove that:

• The community invoked by the objector is a clearly delineated community; and
• Community opposition to the application is substantial; and
• There is a strong association between the community invoked and the applied-for gTLD string; and
• The application creates a likelihood of material detriment to the rights or legitimate interests of a significant portion of the community to which the string may be explicitly or implicitly targeted.

Section 3.5.4 of the AGB

http://newgtlds.icann.org/en/applicants/agb/objection-procedures-04jun12-en.pdf

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If opposition by a community is determined, but there is no likelihood of material detriment to the targeted community resulting from the applicant’s operation of the applied-for gTLD, the objection will fail.

The objector must meet all four tests in the standard for the objection to prevail.