Click to play videoVienna: There have been questions raising about China's role at the NSG, and there are some fears also that China may want to hit back by looking at a similar exception for Pakistan.
"Doubtless one of the reasons why Pakistan did not oppose this deal when it went through the IAEA phase is that Pakistan would also like a deal of this kind,” says, specialist on nuclear energy, King's College, James Acton.
“Whether or not they chose to get a Pakistan deal through, impossible at this stage, in the next few years unlikely, but in the longer term, who knows China has always been a strategic ally of Pakistan. And China would be the country to back an exemption to trade with Pakistan," he adds.
Pakistan had made it clear at the IAEA board meeting that it will be looking for a similar exception.
"I think for Pakistan it is pretty unlikely they could be making any kind of claim of this nature but it would be legitimate to make a claim," says expert on South Asian affairs at the School of Oriental and African Studies, Lawrence Saez.
China has had a strong hand in Pakistan's nuclear programme, and that has been at least indirectly a factor in the proliferation from Pakistan to North Korea and other countries. There are some fears that the India deal could now spur more of that.
"I'm afraid it will only provide a further excuse to Iran not to accept additional constraints, for North Korea to be less willing to give up its nuclear weapons, and for Pakistan and Israel to seek a similar exception,” says International Institute for Strategic Studies, Mark Fitzpatrick.
“And in the case of Pakistan, having so recently allowed its own nuclear technology to be sold to at least three other states who are seeking nuclear weapons, then there will be the danger of a precedent," he adds.
Pakistan held back its opposition at the IAEA, China at the NSG. But there remain lingering questions whether this nod is the last we've seen of them in this business, whether the deal could have a fallout in the region
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