On 8 February 2007, the Indo-Bhutan Friendship Treaty - PDF (30.6 KB) - was substantially revised. In the Treaty of 1949 Article 2 states:"The Government of India undertakes to exercise no interference in the internal administration of Bhutan. On its part the Government of Bhutan agrees to be guided by the advice of the Government of India in regard to its external relations." In the revised treaty it now reads as "In keeping with the abiding ties of close friendship and cooperation between Bhutan and India, the Government of the Kingdom of Bhutan and the Government of the Republic of India shall cooperate closely with each other on issues relating to their national interests. Neither government shall allow the use of its territory for activities harmful to the national security and interest of the other." The revised treaty also includes this preamble:"Reaffirming their respect for each other's independence, sovereignty and territorial integrity", an element that was absent in the earlier version. The Indo-Bhutan Friendship Treaty of 2007 clarifies Bhutan's status as an independent and sovereign nation.