 Complete the following phrase:  Law on Abolishment of Nagorno-Karabakh Autonomous Oblast is the Resolution No. 279-XII passed by the National Assembly of Azerbaijan and signed into law by the President of Azerbaijan Ayaz Mutalibov on November 26, 1991. The law had been prompted by a vote of National Assembly of Nagorno-Karabakh in favor of uniting itself with Armenia on 20 February 1988. The vote was followed by a referendum in 1988 which was boycotted by the Azerbaijani population of the Oblast; most voted in favor of independence. While these votes and elections had mainly been conducted in a relatively peaceful manner, in the following months, as the 