It is correct.  Did you read your own link?  As I previously stated, Alaska native tribes can mitigate civil matters, but only if both parties agree.  They do not have the authority to try any criminal matter, nor can they legally deprive anyone of their liberty.  Alaskan natives are not sovereign, no matter how much you may wish it.  Congress specifically created ANSCA this way to be completely different from the fiasco of the lower-48 native tribes.  Alaskan natives are Alaskan citizens as well as US citizens, which means they can vote in State elections.  Something lower-48 natives cannot do.  If any tribal government attempts to exert this illegal authority granted to them by Gov. Walker they will be sued into oblivion.