Nuclear units’ lists, which contain the names of nuclear units of the two countries, are exchanged between India and Pakistan as a custom and part of Agreement on Prohibition of Attacks against Nuclear Installations and Facilities. When was this agreement signed?

The Agreement on the Prohibition of Attacks against Nuclear Installations and Facilities between India and Pakistan was signed in December 1988. This bilateral agreement requires both countries to refrain from attacking each other's nuclear facilities and involves annual exchange of nuclear unit lists. The other dates (1999, 2003, 2011) do not correspond to this specific agreement.