...with the original States, at as early periods as may be consistent with the general interest. It is hereby ordained and declared, by the authority aforesaid,...forever remain unalterable, unless by common consent, to-wit: ARTICLE I. — No person demeaning himself in a peaceable and orderly manner, shall .ever be...

...mutual consent clauses. Section 14 of the famous Northwest Ordinance of 1787, for example, contained six "articles of compact, between the original States...and the people and States in the said territory, and [shall] forever remain unalterable, unless by common consent." Van Brocklin v. Tennessee, 117 US 151,...