Before revision: As of 27 October 2022 the MSP was composed of: Australia, Canada, Finland, France, Germany, Japan, Korea, Sweden, the United Kingdom, the United States, and the European Union.
After revision: As of July 2023 the MSP was composed of: Australia, Canada, Finland, France, Germany, India, Japan, South Korea, Sweden, the United Kingdom, the United States, and the European Union.