IEA Multilateral Technology Initiatives, known as Implementing Agreements.

The Implementing Agreement for co-operation on Hybrid and Electric Vehicle Technologies and Programmes (IA-HEV) enables member parties to discuss their respective needs, share key information, and learn from an ever-growing pool of experience from the development and deployment of hybrid and electric vehicles.

IA-HEV was formed in 1993 to produce and disseminate balanced, objective information about advanced electric, hybrid, and fuel cell vehicles. IA-HEV is an international membership group collaborating under the International Energy Agency (IEA) framework. Implementing Agreements are at the core of the IEA International Technology Co-operation Programme coordinated by the IEA Committee on Energy Research and Technology (CERT).

An Implementing Agreement is a system of standard rules and regulations to encourage multinational, collaborative efforts to meet energy challenges. This allows interested IEA member and non-member governments and other organizations to pool resources for research, development, and deployment of particular technologies. An Implementing Agreement runs for a fixed time period, usually in five-year phases. IA-HEV has completed three phases and is currently in Phase 4 which runs from 2009−2015.

IA-HEV offers two types of membership: Contracting Parties and Sponsors. Members designate a representative to serve on the Executive Committee that provides overall direction, approves the budget, and formulates policy and strategy. IA-HEV primary work is conducted through Tasks.

The 18 IA-HEV  country members are: Austria, Belgium, Canada, Denmark, Finland, France, Germany, Ireland, Italy, the Netherlands, Portugal, Republic of Korea, Spain, Sweden, Switzerland, Turkey, the United Kingdom and the United States.