Iranian parliamentarians are preparing a bill that could push Tehran toward exiting the nuclear Non-Proliferation Treaty, the foreign ministry said on Monday, while reiterating Tehran's official stance against developing nuclear weapons. "In light of recent developments, we will take an appropriate decision. Government has to enforce parliament bills but such a proposal is just being prepared and we will coordinate in the later stages with parliament," the ministry's spokesperson Esmaeil Baghaei said, when asked at a press conference about Tehran potentially leaving the NPT.