[1] Land in Montgomery County, Maryland, was purchased for the National Cancer Institute in the 1930s and was officially made a US jurisdiction in 1953.

Then, in October 1968, the Permanent Board of Registry of Montgomery County, Maryland, citing Royer v. Board of Elections Supervisors, announced that persons living on the National Institutes of Health (NIH) federal reservation or enclave located within its geographical boundaries did not meet the residency requirement of Article 1 of the Maryland Constitution.

The Federal District Court issued a temporary injunction allowing residents to vote in the 1968 elections.

As it was subject the legislation of the state and county, they could not be denied the vote without violating their constitutional right to equal protection.

Evans v. Cornman is often cited, usually among other precedents, in cases concerning violations of the Fourteenth Amendment, as it pertains to voting rights and representation, especially in cases concerning residency requirements (Oregon v. Mitchell, Mobile v. Bolden, Whatley v. Clark, Dunn v. Blumstein, etc.).