Suggested text to replace guideline 7.

I've mad a minor change to suggest either forming or joining a community and then noted that such collaboration will vary in importance and utility and thus should not be an obligation.

TLD registries are encouraged to collaborate on issues of shared interest.  Registries may form or join an existing consortium to coordinate contact with external communities, elicit the assistance of support groups, and establish global fora to address common current and emerging challenges in the development and use of IDNs. The maturity and needs of particular IDN communities will vary greatly. Therefore, while collaboration is considered good practice, the assessment of the importance and utility of such consortia is left to the Registry Operator. Registries will be under no obligation to join or establish the communities described in this guideline.