delivered the opinion of the court.
The plaintiff in error was an employee of the Post Office Department of the United States and while driving a government motor truck in the transportation of mail over a post road from Mt. Airy, Maryland, to Washington, was arrested in Maryland, and. was tried, convicted and fined for so driving without having obtained a license from the State. He saved his constitutional rights by motion to quash, by. special pleas which were overruled upon de>murrer and by motion in arrest of judgment. The facts were admitted and the naked question is whether the State has power to require such an employee to obtain a license by submitting to an examination concerning his competence and paying three dollars, before performing his official duty in obedience to superior command.
The cases upon the regulation of interstate commerce can not be relied upon as furnishing an answer. They deal with the conduct of private persons in matters in which the States as well as the general government have an interest and which would be wholly under the control of the States but for the supervening destination and the ultimate purpose of the acts. Here the question is whether the State can interrupt the a fcs of the general government itself. With regard to taxat on, no matter how reasonable, or how universal and undi-.criminating, the State’s inability to interfere has been regarded as established sb ice
McCulloch
v.
Maryland,
Of course an employee of the United States does not secure a general immunity from state law while acting in the course of his employment. That was decided long ago by Mr. Justice Washington in
United States
v.
Hart,
Pet. C. C. 390. 5 Ops. Atty. Gen. 554. It very well may be that, when the United States has not spoken, the subjection to local law would extend to general rules that might affect incidentally the mode of carrying out the employment — as, for instance, a statute or ordinance regulating the mode of turning at the corners of streets.
Commonwealth
v.
Closson,
229 Massachusetts, 329. This might stand on much the same footing as liability under the common law of a State to a person injured by the driver’s negligence. But even the most unquestionable and most universally applicable of state laws, such as those concern
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ing murder, will not be allowed to control the conduct of a marshal of the United States acting under and in pursuance of the laws of the United States.
In re Neagle,
It seems to us that the immunity of the instruments of the United States from state control in the performance of their duties extends to a requirement that they desist from performance until they satisfy a state officer upon examination that they are competent for a necessary part of them and pay a fee for permission to go on. ^Süch a requirement does not merely touch the Government servants remotely by a general rule of conduct; it lays hold of them in their specific attempt to obey orders and requires qualifications in addition to those that the Government has pronounced sufficient. It is the duty of the Department to employ persons competent for their work and that duty it must be presumed has been performed. Keim v. United States, 177 U. S. 290, 293.
Judgment reversed.
