The phrase "activities of states" is correct and usable in written English.
It can be used in contexts discussing the actions, policies, or behaviors of governmental entities or nations.
Example: "The activities of states in international relations often shape global policies and agreements."
Alternatives: "actions of nations" or "conduct of governments".
Let us be guided by, and expand, both the Outer Space Treaty (1967) and the Agreement Governing the Activities of States on the Moon and Other Celestial Bodies (1979).
Examples of such resolutions include the Declaration on the Granting of Independence to Colonial Countries and Peoples (1960), the Declaration on the Legal Principles Governing Activities of States in the Exploration and Use of Outer Space (1963), and the Declaration on Principles of International Law Concerning Friendly Relations and Co-operation Among States (1970).
The US Congress has often used the Commerce Clause to justify exercises of legislative power with respect to the activities of states and their citizens.
For those who haven't recently brushed up on existing space policy, a widely adopted international agreement called the "Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space including the Moon and Other Celestial Bodies" was negotiated, signed and drafted in 1967 by the United Nations.
By indexing the activities of states and metro regions, we can track overall progress, and learn from both emerging best practices and unforeseen mistakes.
UPDATE: Over at Reddit, a commenter reminds everyone that the United States is party to an actual United Nations Outer Space Treatyy," formally known as "The Treaty on Principles Governing the Activities of States in the Exploration and Use of Outer Space, Including the Moon and Other Celestial Bodies".
The commission's inquiries focussed in particular on whether the outside business activities of state legislators should be subject to tighter regulation.
The governor supervises the state budget, coordinates the activities of state agencies, boards, and commissions, initiates future planning, and is the focus of federal-state interaction.
In addition to determining whether Cuomo had unlawfully obstructed the investigators, Bharara had an opportunity to examine the prime source of corruption in Albany in recent years — the outside activities of state legislators.
The amendments, if adopted in two additional votes, would label as extremist those who "impede the activities of state bodies" or organize or take part in public disturbances, according to news reports.
But some of the provisions it has introduced to the TPP such as those directed at the activities of state-owned enterprises seem designed to hinder Chinese entry.The Chinese government professes an "open" attitude to the TPP.
