"[T]he Articles of this confederation shall be [faithfully] observed by every state, and the union shall be perpetual; nor shall any alteration at any time hereafter be made in any of them, unless such alteration agreed to in a congress of the united states, and be afterwards confirmed by the legislature of every state." -- Article of Confederation, Article XIII Based on the excerpt, which statement describes a similarity between the Articles of Confederation and the Constitution?