The Child Labor Amendment is an unratified amendment proposed in 1924, which would grant Congress the authority to regulate the labor of children under the age of 18. It was ratified by 28 states, the last in 1937, and is still pending as no deadline for ratification was specified. The proposed amendment was the subject of the landmark case of Coleman v. Miller (1939), which held that if an amendment did not contain a ratification deadline, it did not expire.
The text reads:
Section 1. The Congress shall have power to limit, regulate, and prohibit the labor of persons under eighteen years of age.
Section 2. The power of the several States is unimpaired by this article except that the operation of State laws shall be suspended to the extent necessary to give effect to legislation enacted by the Congress.