Rowain Wrote:You are not modificating the agreement you are breaking it.This is, in fact, exactly my point. "If you give me three cities we have an NAP" is a perfectly legitimate agreement. In my hypothetical, I'm "modifying" the agreement from "we have an NAP" to "if you give me three cities we have an NAP". As you correctly note, that is not modifying the agreement, it's breaking it.
"Modifying" an agreement "we have an NAP" to "we have an NAP as long as you don't declare on X" is, in exactly the same way, BREAKING the agreement, because there is no such thing as a unilateral modification of an agreement.