Ch. 5.6. Primary Source: The U.S. Militia Act of 1792
An Act more effectually to provide for the National Defense, by establishing an Uniform Militia throughout the United States, May 8, 1792.
Be it enacted by the Senate and House of Representatives of the United States of America, in Congress assembled:
Section 1: That each and every free able-bodied white male citizen of the respective States, resident therein, who is or shall be of age of eighteen years, and under the age of forty-five years (except as is herein after excepted) shall severally and respectively be enrolled in the militia, by the Captain or Commanding Officer of the company, within whose bounds such citizen shall reside, and that within twelve months after the passing of this Act…
That every citizen, so enrolled and notified, shall, within six months thereafter, provide himself with a good musket or firelock, a sufficient bayonet and belt, two spare flints, and a knapsack, a pouch, with a box therein, to contain not less than twenty four cartridges, suited to the bore of his musket or firelock, each cartridge to contain a proper quantity of powder and ball; or with a good rifle, knapsack, shot-pouch, and powder-horn, twenty balls suited to the bore of his rifle, and a quarter of a pound of powder; and shall appear so armed, accoutred and provided, when called out to exercise or into service…
That the…officers, judicial and executives, of the government of the United States; the members of both houses of Congress, and their respective officers; all custom house officers, with the clerks; all post officers, and stage-drivers who are employed in the care and conveyance of the mail of the post office of the United States; all ferrymen employed at any ferry on the post road; all inspectors of exports; all pilots, all mariners actually employed in the sea service of any citizen or merchant within the United States; and all persons who now are or may be hereafter exempted by the laws of the respective states, shall be and are hereby exempted from militia duty…
Sec. 2. And be it further enacted, That whenever the laws of the United States shall be opposed or the execution thereof obstructed, in any state, by combinations too powerful to be suppressed by the ordinary course of judicial proceedings, or by the powers vested in the marshals by this act, the same being notified to the President of the United States, by an associate justice or the district judge, it shall be lawful for the President of the United States to call forth the militia of such state to suppress such combinations, and to cause the laws to be duly executed. And if the militia of a state, where such combinations may happen, shall refuse, or be insufficient to suppress the same, it shall be lawful for the President, if the legislature of the United States be not in session, to call forth and employ such numbers of the militia of any other state or states most convenient thereto, as may be necessary, and the use of militia, so to be called forth, may be continued, if necessary, until the expiration of thirty days after the commencement of the ensuing session.
Sec. 4. And be it further enacted, That the militia employed in the service of the United States, shall receive the same pay and allowances, as the troops of the United States, And that no officer, non-commissioned officer or private of the militia shall be compelled to serve more than three months in any one year, nor more than in due rotation with every other able-bodied man of the same rank in the battalion to which he belongs.
Source: the Library of Congress, under An Act More Effectually to Provide for the National Defence by Establishing a Uniform Militia.