Which class was added to the federal fair housing legislation in 1974?

The class added to the federal fair housing legislation in 1974 was gender. This amendment to the Fair Housing Act made it unlawful to discriminate in housing based on a person's sex. The original Fair Housing Act, enacted in 1968, prohibited discrimination based on race, color, religion, and national origin, but it did not initially address gender. By including sex as a protected class, the 1974 amendment helped to provide greater equal rights and protections for individuals in the housing market, laying the groundwork for further protections for additional classes such as disability and familial status in subsequent years.