Newly proposed rules aimed at bolstering protections for famous trademarks on the Internet may not have the desired effect, according to several IP lawyers familiar with the plan.

Under Friday’s long-awaited report by the United Nations’ World Intellectual Property Organization, so-called cybersquatters would be banned from registering famous or well-known trademarks as domain names. However, trademark attorneys say the report does not spell out criteria for determining what names specifically would fall under the restrictions.