WASHINGTON-Refusal to provide additional money for upgrading Pakistans ageing F-16s jets is one of the several benchmarks the US Congress is moving to impose for providing the Pak govt with US military assistance, a leading US newspaper reported on Saturday. The Washington Post said, 'the proposed restrictions, introduced in House legislation on Thursday, have made both the White House and the Pak govt uneasy. Pak Ambassador to US, Hussain Haqqani, says he would lobby US lawmakers to address the proposed restrictions on assistance in the measure. 'At the same time, Haqqani was quoted as saying by the Post, 'it might be prudent not to restrict security assistance. Because Pakistans Armed forces will be the spearhead in the actual fight with the terrorists. The Pakistan Enduring Assistance Cooperation Enhancement (PEACE) act of 2009, or PEACE act of 2009 as it is known, would set up a programme to monitor Pakistani progress in a number of areas, including defeating extremists and protecting human rights, and require Obama to provide specifics underlying his own assessments. 'It would also prohibit additional US spending on Pakistans F-16 jet fighter fleet, which the Bush administration agreed to upgrade, the Post said. 'Lawmakers have argued that the planes are part of Pakistans defence strategy against neighbouring India but that they have little use in counterinsurgency efforts against al-Qaeda and Taliban forces. The bill says, among other elements, that the US expects Pakistan 'not to support any person or group that conducts violence, sabotage, or other activities meant to instil fear or terror in India, according to Press reports. It also seeks an annual US Presidential determination that Pakistan 'has demonstrated a sustained commitment to and made progress towards combating terrorist groups. This includes 'taking into account the progress the govt of Pakistan has made with regard to ceasing support, including by any elements within the Pakistan military or its intelligence agency, to extremist and terrorist groups, particularly to any group that has conducted attacks against US or coalition forces in Afghanistan, including Afghanistan National Security Forces, or against the territory of India or the people of India. The bill sponsored by House Foreign Affairs Committee Chairman Howard Berman, a Democrat, would authorise three billion dollars in aid to train and equip the Pak military over the next five years, alongwith 7.5 billion dollars in economic and development assistance. It would also limit the kinds of military equipment Pakistan could receive and the ways in which it could be used, and require regular audits and Presidential certification of counter-insurgency progress. A bill with similar aid amounts is being drafted in the Senate Foreign Relations Committee, although Senate discussions with the White House on benchmark provisions are ongoing. Introduction of that legislation is not planned until after the two-week congressional recess. President Barack Obama has said that the US must 'demonstrate through deeds as well as words a commitment [to Pakistan] that is enduring. He has called on Congress to pass the still-unseen Senate bill. At the same time, Obama pledged, there would be no 'blank cheque. Recalling 'mixed results from previous billions of dollars in aid, he said that 'Pakistan must demonstrate its commitment to rooting out al-Qaeda and the violent extremists within its borders.