Johnson v. Maryland, 254 U.S. 51 (1920)
U.S. Supreme CourtJohnson v. Maryland, 254 U.S. 51 (1920)
Johnson v. Maryland
Argued October 18, 1920
Decided November 8, 1920
254 U.S. 51
A law of a state penalizing those who operate motor trucks on highways without having obtained license based on examination of competency and payment of a fee cannot constitutionally apply to an employee of the Post Office Department while engaged in driving a government motor truck over a post road in the performance of his official duty. P. 254 U. S. 55.
This was a prosecution based on § 143 of Art. 56 of the Code of Public General Laws of Maryland, as amended by c. 85, Acts of 1918. The opinion states the case.