The Treaty allows for withdraw from the contract if a nations "supreme interest" is in anyway seen to be jeopardized (Marquis, Ridder A05). The only requirement of this action is six months notice before withdraw. In other words, no nation could use this clause to instantly refute the Treaty and resume testing when relations got heated, but with advanced notice we could get out of the Treaty if it were our best interests.
At the current time there is no need for powerful nuclear weapons because international relations are positive. The Comprehensive Test Ban Treaty would have created a stronger international summit, allowing for the downsizing of weaponry. Even in the event of a need for nuclear weapons our computer monitoring systems will have us up-to-date with testing. Also, on the future U.S. agenda for defense systems is the National Missile Defense system, which attempts to develop anti-missile missiles ("Consensus"). This system will be constructed despite the regulations in the 1972 Antiballistic Missile Treaty specifically to ensure that Americans are safe without the actual testing of nuclear weapons. .
Even though we are taking all of these safety precautions so that we feel secure, "the Government employs a $4.5 billion annual program of computer models and non-nuclear explosive tests," and with this technology available we have not had to test a weapon since 1992 (Schmitt A1, Tyson 1). In fact, the number of international nuclear tests has drastically decreased from 178 in 1963, to only 57 in the 1990's combined ("Dangers"). If we haven't tested a nuclear bomb in 7 years without added protections, why should we even need a security blanket? Nuclear weapons are not as readily tested and therefore the loss of underground testing would be no great impairment. There is an annual inspection each year of a prototype of each bomb to ensure that decay has not begun.