Which international treaty has Pakistan refused to sign, citing concerns about national security?

Which international treaty has Pakistan refused to sign, citing concerns about national security?

قومی سلامتی کے خدشات کا حوالہ دیتے ہوئے پاکستان نے کون سا بین الاقوامی معاہدہ پر دستخط کرنے سے انکار کردیا ہے؟
Explanation
  • Pakistan has not signed the NPT due to concerns over its national security and nuclear deterrence against regional threats.
  • India also refused to sign the NPT, as both countries consider it discriminatory.