The phrase "agreement countries" is correct and usable in written English.
It can be used to refer to countries that are part of a specific agreement or treaty.
Example: "The trade benefits will only apply to the agreement countries that have ratified the treaty."
Alternatives: "contracting countries" or "signatory nations".
Under the Paris agreement, countries have agreed to limit global warming to between 1.5 and 2C.
Under the Paris Agreement, countries will have to submit estimates every two years.
Under the Paris agreement, countries aren't required to submit legally binding plans for reducing emissions.
Under a new addition to that agreement countries around the world have agreed to remove the harmful HFCs used in some air-conditioning and refrigeration systems.
In ratifying the Paris Agreement, countries have pledged to limit the increase in average global temperature to below two degrees Celsius above pre-industrial levels.
That structure also means the U.S. withdrawal likely won't spell the end of the agreement — countries have little incentive to leave.
The institute's agreements with these countries included permission to upload sequences to publicly accessible repositories.
In trade agreements, countries voluntarily limit their policy options in return for restrictions on the choices of the other member countries.
Finally, despite the pressure exerted by the WTO agreements, countries continue to differ markedly in their willingness and ability to enforce their copyright laws.
Under international trade agreements, countries are only allowed to impose trade restrictions based on health concerns if those concerns are backed by scientific evidence.
For example, exports of corn from Iowa to trade-agreement countries more than doubled in the past decade, with more than 60% of the state's shipments going to Mexico, a partner in the North American Free Trade Agreement.
