1793 Mass. Acts 289-90

And be it enacted by the authority aforesaid, That each and every free, able-bodied white male citizen, of this, or any other of the United States, residing within this Commonwealth, who is, or shall be of the age of eighteen years, and under the age of forty-five years (except as is herein after excepted) shall severally and respectively be subject to the requisitions of this Act, and shall be enrolled in the Militia, by the Captain or Commanding Officer of the company, within whose bounds such citizens shall reside, within three months from and after the passing this Act: And it shall be at all times hereafter the duty of the Commanding Officer of every such company, to enroll every such citizen as aforesaid; and also those, who shall from time to time arrive at the age of eighteen years, or being of the age of eighteen years, and under the age of forty-five years, and not herein after excepted, shall come to reside within his bounds; and shall without delay notify such citizen of the enrollment, by a non-commissioned officer or other person, duly authorized for that purpose, by whom such notice may be proved; and in all cases of doubt respecting the age of any person enrolled, or intended to be enrolled, the party questioned, shall prove his age to the satisfaction of the Commanding Officer of the company within whose bounds he may reside.