The Lanham Act sets forth which trademarks may be registered at the Patent and Trademark Office. It contains a number of limitations on registrability. Section 2(a) prohibits among other things the registration of a mark that “[c]onsists of or comprises immoral, deceptive, or scandalous matter; or matter which may disparage or falsely suggest a connection with persons, living or dead, institutions, beliefs, or national symbols, or bring them into contempt, or disrepute.” This provision originally came into force in 1946 with the enactment of the Lanham Act, but the prohibitions it sets forth have been in effect since the late nineteenth century, when the federal government first began to register trademarks.