intergovernmental

[ in-ter-guhv-ern-men-tl, -er-men- ]

/ ˌɪn tərˌgʌv ərnˈmɛn tl, -ərˈmɛn- /

involving two or more governments or levels of government.

Origin of intergovernmental

First recorded in 1925–30; inter- + governmental

The IPCC is an intergovernmental body set up for the purpose of studying climate change.

The Real Climate-Change Lesson from the Oklahoma Tornado |Andrew T. Guzman |May 22, 2013 |DAILY BEAST
We can group the appropriate United States policies into three areas: interpersonal, intergovernmental, and intergenerational.

Our Next Step in the Middle East |Jeremi Suri |October 8, 2011 |DAILY BEAST
Fifth and finally, it is not just at an intergovernmental level that we see the signs of more cooperation.

The New Co-op Capitalism |Noreena Hertz |February 23, 2009 |DAILY BEAST
Upon the initiative of this Government a year's postponement of reparations and other intergovernmental debts was brought about.

State of the Union Addresses of Herbert Hoover |Herbert Hoover

So the problem is not unique to this situation; it affects all intergovernmental relations.

Warren Commission (5 of 26): Hearings Vol. V (of 15) |The President's Commission on the Assassination of President Kennedy
In the Hague Conventions and other intergovernmental instruments the rudiments of international government already exist.

The Unity of Civilization |Various
The diplomatic corps was flawless in their handling of intergovernmental affairs.

The Dueling Machine |Benjamin William Bova

intergovernmental

/ (ˌɪntəˌɡʌvəˈmɛntəl) /

conducted between or involving two or more governments an intergovernmental conference