Well, since I did the California post yesterday on this, multiple people from Wisconsin reminded me that we all need to submit supportive comments there. Many thanks to NL for spelling it out in an email so I can just cut and paste it here (ie making it easy for me):

Over in Wisconsin, we have a pending ICWA pro hoc vice rule petition that could use some more supporting comments, especially from adjacent states!  You can find the petition here (https://www.wicourts.gov/scrules/1804.htm).

The process for submitting a comment is as follows:

To submit a comment:

I. Submitting a comment to a rules petition
A comment to a pending rule petition shall be submitted in hard copy (include one original and nine copies). The paper copies shall be mailed to the Clerk of the Supreme Court, P.O. Box 1688, Madison, WI 53701.

A person submitting a comment shall e-mail an electronic copy of the comment in MS Word format MS Word to the Office of the Clerk of the Supreme Court at clerk@wicourts.gov and carrie.janto@wicourts.gov.

II. Contents of comment
The comment shall identify the rule petition to which it relates.

III. Service of comment on petitioner
A copy of the comment shall be forwarded to the petitioner in a timely manner. See the rule petition for the name and contact information of petitioner.

https://www.wicourts.gov/scrules/1804.htm