Not according to this article: http://www.bismarcktribune.com/news/local/article_79960c4d-387f-51c5-a731-b04558a85e27.html
"Athletic Director Joel Maturi said the school's Advisory Committee on Athletics approved a policy in 2003 that discourages games with teams using American Indian mascots and nicknames. The policy has not been strictly enforced, but it will be now, Maturi said Monday."
"At least two other Big 10 schools - the University of Wisconsin and the University of Iowa - have policies stating the schools will not play teams with American Indian mascots unless contract or conference obligations require them to do so."
Although they may follow this sanctions list, I can't find anywhere that they state they do. All I have found are articles like this one that said they refuse to play teams with NA nicknames. I trust you know what you are talking about, so you don't have to go digging anything up for me.