António Guterres urges two powers to quickly sign new deal as New Start expires
The UN secretary general, António Guterres, has urged the US and Russia to quickly sign a new nuclear arms control deal, as the existing treaty expired in what he called a “grave moment for international peace and security”.
The last nuclear treaty between the two powers, the New Start agreement, ended on Thursday, formally releasing both Moscow and Washington from a raft of restrictions on their nuclear arsenals and triggering fears of a global arms race.
“For the first time in more than half a century, we face a world without any binding limits on the strategic nuclear arsenals of … the two states that possess the overwhelming majority of the global stockpile of nuclear weapons,” Guterres said in a statement on Wednesday.


I haven’t looked into this particular agreement, but historically arms treaties included verification, limited by what both parties would accept for verification. IIRC, since neither country wanted to let foreign inspectors into their ICBM silos, SALT had the US and USSR dismantle ICBMs where satellites could see.