Mass. Gen. Laws ch. 222 § 11
Persons serving in or with the armed forces of the commonwealth or other reserve component commands when conducting mobilization exercises and soldier readiness processing or the armed forces of the United States or their dependents, wherever located, may acknowledge any instrument in the manner and form required by law before a commissioned officer in the active service of the armed forces of the commonwealth or the United States with the rank of second lieutenant or higher in the army, air force or marine corps or ensign or higher in the navy or United States Coast Guard. Any such instrument shall contain a statement that the person executing the instrument is serving in or with the armed forces of the commonwealth or other reserve component command when conducting mobilization exercises and soldier readiness processing or the armed forces of the United States or is a dependent of any such person. No such instrument shall be rendered invalid by the failure to state in the instrument the place of execution or acknowledgment.
Mass. Gen. Laws ch. 222, § 11