American Hotel & Lodging Association

American Society of Association Executives

Association of Convention Operation Management

Canadian Tourism Commission

Canadian Tourism Research Institute

Centers For Disease Control and Prevention, Travelers' Health Page (U.S.)

Convention Industry Council

Convention Sales Professionals International (CSPI)

European Federation of Conference Towns

European Travel Commission

Green Meetings Industry Council

Hospitality Sales & Marketing Association International

International Association of Assembly Managers

International Association of Exhibitions & Events

International Professional Congress Organisers

International Congress & Convention Association

International Ecotourism Society

Meetings Industry Association (UK)

Meeting Professionals International

National League of Cities

National Tour Association

Pacific Asia Travel Association (PATA)

Professional Convention Management Association (PCMA)

Religious Conference Management Association

Society of Government Meeting Professionals

Society of Incentive & Travel Executives

Travel Business Roundtable

U.S. Travel Association (formerly TIA) 

U.S. Conference of Mayors

U.S. Department of Commerce Tourism Industries

U.S. Department of Homeland Security

U.S. Department of State

U.S. Transportation Security Administration
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World Tourism Organization
       World Tourism Organization Code of Ethics

World Travel & Tourism Council