sending a letter of notification to each Governor. Each Governor then formally submits the amendment to their state's legislature. When a state ratifies a proposed amendment, it sends the Archivist an original or certified copy of the state's action. Ratification documents are examined by the Office of the Federal Register for facial legal sufficiency and an authenticating signature. Article Five ends by shielding certain clauses in the new frame of government from being amended. Article One, Section 9, Clause1 prevents Congress from passing any law that would restrict the importation of slaves into the United States prior to 1808, plus the fourth clause from that same section, which reiterates the Constitutional rule that direct taxes must be apportioned according to state populations. These clauses were explicitly shielded from Constitutional amendment prior to 1808. On January 1, 1808, the first day it was permitted to do so, Congress approved legislation prohibiting the importation of slaves into the country. On February 3, 1913, with ratification of the Sixteenth Amendment, Congress gained the authority to levy an income tax without apportioning it among the states or basing it on the United States Census. The third textually entrenched provision is Article One, Section 3, Clauses 1, which provides for equal representation of the states in the Senate. The shield protecting this clause from the amendment process ("no state, without its consent, shall be deprived of its equal Suffrage in the Senate") is less absolute but it is permanent. Article VI Article VI establishes that the Constitution and all federal laws and treaties made in accordance with it have supremacy over state laws, and that "the judges in every state shall be bound thereby, any thing in the laws or constitutions of any state notwithstanding." It validates national debt created under the Articles of Confederation and requires that all federal and state legislators, officers, and judges take oaths or affirmations to support the Constitution. This means that the states' constitutions and laws should not conflict with the laws of the federal constitution and that in case of a conflict, state judges are legally bound to honor the federal laws and constitution over those of any state. Article Six also states "no religious Test shall ever be required as a Qualification to any Office or public Trust under the United States." Article VII Article VII describes the process for establishing the proposed new frame of government.