Police officers arrested at least 30 people, including clergy members, today at a rally against a citywide ban on religious services in public spaces. The protest, launched by Councilman Fernando Cabrera (D-District 14), was held outside Morris High School while Mayor Michael Bloomberg delivered his State of the City address inside. Demonstrators say they are denouncing a law ordering the Department of Education to prohibit worship services in public schools. Cabrera says he will draft a bill to have the law overturned, and that he has garnered support from Democrats and Republicans alike. The measure goes into effect Feb. 12.