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20 CFR §404.1037

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
If you work as an employee within the United States on or in connection with (as explained in § 404.1004(b)(8)) a vessel or aircraft that is not an American vessel (as defined in § 404.1004(b)(3)) or American aircraft (as defined in § 404.1004(b)(2)), your work is excluded from employment if—
  1. (a)You are not a citizen of the United States or your employer is not an American employer (as defined in § 404.1004(b)(1)); and
  2. (b)You are employed on and in connection with (as explained in § 404.1004(b)(7)) the vessel or aircraft when outside the United States.