...SEC. 2. [Penalty for violation.] — That any officer or agent of the Government of the United States or of the District of Columbia, or any contractor...direct, or control any laborer or mechanic employed upon any of the public works of the United States or of the District of Columbia who shall intentionally...

...any one calendar day ; and It shall be unlawful • • • to require or permit any such • • * person employed to perform services similar to those...any river or harbor of the United States or of the District of Columbia, to work more than eight hours In any calendar day, except In case of extraordinary...

...emergency : Provided, That nothing in this act shall apply or be construed to apply to persons employed In connection with dredging or rock excavation In any river or harbor of the United States or the District of Columbia while not directly operating dredging or rock-excavating nmchlnery or tools...

...States or of the District of Columbia, to require or permit any such laborer or mechanic or any such person employed to perform services similar to those...any river or harbor of the United States or of the District of Columbia, to work more than eight hours in any calendar clay, except in case of extraordinary...

...States or of the District of Columbia, to require or permit any such laborer or mechanic or any such person employed to perform services similar to those...any river or harbor of the United States or of the District of Columbia, to work more than eight hours in any calendar day, except in case of extraordinary...

...United States or of the District of Columbia ; to any contractor, subcontractor, or any agent of such contractor or subcontractor whose duty it shall be...employed upon a public work of the United States or of any Territory of the United States, or of the District of Columbia. Sec 2. That it shall be unlawful...

...Tllat any officer or agent of the Government of or contractor- the United States or of the Distiict of Columbia, or any contractor or subcontractor whose...direct, or control any laborer or mechanic employed upon any of the public works of the United States or of the District of Columbia who shall intentionally...

...Iat?™alg fo0rfflvc^ the United States or of the District of Columbia, or anyor o"lt™ctorcontractor or subcontractor whose duty it shall be to employ,...direct, or control any laborer or mechanic employed upon any of the public works of the United States or of the District of Columbia who shall intentionally...

...the Government of the United States or of the District of Columbia, or any or oontraetorcontractor or subcontractor whose duty it shall be to employ,...direct, or control any laborer or mechanic employed upon any of the public works of the United States or of the District of Columbia who shall intentionally...

...Government upon any public work of the United States, and of all persons employed by the Government to perform services similar to those of laborers and...excavation in any river or harbor of the United States, is limited to eight hours in any one calendar day except in case of extraordinary emergency; and WHEREAS...