Yes. In general, Foreign Dignitaries, all on-duty employees for the American Red Cross, Federal Credit Union employees on official business, and Federal Government employees on official business are exempt. The guest must complete the City of Orange Certificate of Tax Exemption form, which must be kept by the hotel operator (O.M.C. 5.16.040).
Note: State Government, County, and local government employees are not exempt. Contractors hired by government agencies are not exempt. Non-profit groups are not exempt.