Vars studied law at the University of Tromsø, earning her cand.jur. degree in 2001 and her doctorate in international law in 2010, with a dissertation entitled "The Sámi People's Right to Self-determination". She worked as a legal adviser for the Sami Parliament from 2001 to 2004, and she played a central role in the adoption of the Finnmark Act, which gave about 95% of the land of Finnmark county to its inhabitants. She also participated in the negotiations on the United Nations Declaration on the Rights of Indigenous Peoples on behalf of the Sami Parliament. She has led the Sami Jurists Association and has sat on several committees at the University of Tromsø. She has also published several articles on Sami and indigenous rights. During the Sami parliamentary election of 2009, she was the first candidate on the Árja party's list for the second electoral district. She was elected to the Sami Parliament, beating two former Sami Parliament presidents in her district, and served as vice president for the 2009–2013 term. On 25 February 2010, the Sami Parliament decided that Executive Council members would not participate in plenary, so Alf Isaksen took over her plenary seat as substitute member. Vars was re-elected for the 2013–2017 term and led Árja's contingent in the Sami Parliament. She sat on the Planning and Finance Committee as well as the Executive Council from 2013 to 2017. Vars asked to be relieved of her duties as a member of parliament as of 1 January 2017 when she took her position at the NHRI. From 2013 to 2015, Vars served as a member of the Norwegian government's Tater/Romani Committee, which focused on the relationship between the government and the Norwegian Travellers. From 2013 to 2016, she was a member of the Norwegian National Commission for UNESCO. Vars is vice-president of the board of the Faculty of Law at the University of Tromsø, and was chosen as an institutional member of the International Work Group for Indigenous Affairs, based in Copenhagen, Denmark. On 24 March 2017, she was selected to serve from 2017 to 2020 as the expert member from the Arctic on the Expert Mechanism on the Rights of Indigenous Peoples, an advisory board of the Office of the United Nations High Commissioner for Human Rights.
