The aim of the IVU shall be to promote vegetarianism throughout the world. For the purpose of this Constitution, vegetarianism is defined as the practice of not eating meat, poultry or fish or their by-products, with or without the use of dairy products or eggs. Full membership is open to any organisation that advocates vegetarianism and is governed exclusively by vegetarians. Individual membership is open to individual vegetarians.
Associate membership is open to individuals and organisations that are sympathetic to vegetarianism.
Membership becomes effective upon payment of an annual subscription and acceptance of the application by the Hon. General Secretary or the appropriate Hon. Regional General Secretary, and subject to ratification by the International Council. The affairs of IVU shall be governed by its member organisations through the General Meeting periodically held, usually at world congresses, or by a postal ballot Between General Meetings the affairs of IVU shall be managed by the International Council. General Meetings or postal ballots of member organisations may also be called by the International Council or as a result of a request by a majority of member organisations.