What limits did the u. s., u. s.s. r, and great britain agree to regarding nuclear weapons testing in 1963?
each nation was permitted a limited number of tests per year
testing could only occur underground
testing plans had to be submitted to the other countries for approval
all testing had to take place on uninhabited islands

Answer;
Each nation was permitted a limited number of tests per year.

The limits that the U.S., U.S.S.R, and Great Britain agree to regarding nuclear weapons testing in 1963 was that Each nation was permitted a limited number of test per year.

Explanation;
The Limited Test Ban Treaty was signed by the United States, the Soviet Union, and Great Britain in 1963, and it banned all nuclear tests in the atmosphere, in space, or underwater. Because it stopped the spread of radioactive nuclear material through atmospheric testing and set the precedent for a new wave of arms control agreements, the Treaty was hailed as a success.

February 1848 is when it was added. if that's what you were asking