UNITED NATIONS - As the 189 member nations of the 1970 Nuclear Non-Proliferation Treaty (NPT) begin to wrap up negotiations Friday, considerable disagreement still exists over how to establish a Middle East zone free of nuclear weapons. With the potential to derail a Final Document by consensus, diplomats said implementing the 1995 Middle East Resolution, which is opposed by Israel, has become something of a sticking point for Israel's allies and the Arab states. In particular, delegates are negotiating whether the Final Document should reaffirm "the importance of Israel's accession to the NPT," which would require it to abandon its nuclear arsenal. Like Pakistan and India, Israel never joined the NPT. Instead, it enacts a policy of nuclear ambiguity, neither confirming nor denying the existence of its atomic warheads. If Israel is named and shamed, say diplomats, it will not attend the 2012 conference on establishing a region free from nuclear weapons and weapons of mass destruction (WMDs) to be attended by all Middle East states. The carefully crafted draft document being debated here on Friday appoints a facilitator to prepare for the conference, which would be convened by not just the UN secretary-general but also by Russia, the United Kingdom and the United States in consultation with Middle East countries. The new section also omits the word "simultaneously" in describing efforts of the Middle East Peace Process in contributing to a region free from nukes and WMDs. Israel has argued that a nuclear-free Middle East will only be attainable after the region is covered by a comprehensive peace agreement. The month-long Review Conference is expected to produce a Final Document at the end of Friday. However, it is unclear whether an agreement will be reached by consensus.