The McGill Guide gives some general guidance about how to cite Indigenous legislative documents:
the title should be in italics
if the title is not in English or French, include a description or translation in square brackets
Beyond these instructions, provide the information necessary for your reader to locate the source.
Algonquins of Pikwàkanagàn First Nation Matrimonial Real Property Law, Law 2014-01, enacted by Referendum by the Members of the Algonquins of Pikwàkanagàn First Nation (8 April 2014), online: <https://www.algonquinsofpikwakanagan.com> [https://web.archive.org/web/20230628142314/https://www.algonquinsofpikwakanagan.com/wp-content/uploads/2019/01/mrp.pdf].
Abinoojii Inakonigewin [Child Care Law], 2005, Anishinaabe Nation in Treaty #3, online: </peohttp://gct3.ca> [https://web.archive.org/web/20230628142459/http://gct3.ca/people/social/abinoojii-inakonigewin/abinoojii-inakonigewin-law/].
When citing to an online source, if the URL is long and unwieldy and the citation includes an archived URL, only include the root URL (more information is available under CIting Online Resources.
More information and more examples can be found at 2.1.1.
Guidance on citing Indigenous constitutions can be found at 2.2.