Q. Khan network, as well as the transfer of nuclear technology from China to Pakistan.

The letter stressed that an 'an excessive focus on non-proliferation does a disservice to the essential principle of the mutually reinforcing linkage between disarmament and non-proliferation'.

'International efforts in this regard should build the necessary confidence among states so that international treaties and agreements are multilaterally negotiated and freely accepted, which remains the true test of their legitimacy and credibility,' said Puri.

India recalled that the South Asian nation had been calling for global disarmament since as far back as 1988 when the then Prime Minister Rajiv Gandhi made the global call.

Puri added that India remained committed to a voluntary, unilateral moratorium on nuclear testing and reaffirmed policy of no-first-use of nuclear weapons.

The UNSC resolution makes it imperative upon countries to strengthen their export controls while transferring technology and material to other countries. The resolution is however non-binding.

The chairing of the UNSC session by the US president, which indicates the focus on non-proliferation by the Obama administration, has been looked at with concern by India as it has only last year managed to get out of a nuclear apartheid. The Nuclear Suppliers Group had approved trade with India, despite the country not being a signatory to the NPT.

National Security Advisor M.K. Narayanan in an interview Monday said that he would be speaking to US officials on the extent of the resolution and its effect on the US-India civil nuclear cooperation agreement.

He also mentioned that he had talks with Britain, France and Russia, who had indicated that the resolution would not affect their obligations under any bilateral agreement on civilian nuclear energy.