The Civil Rights Act of 1968 prohibited the following forms of discrimination:
1. Refusal to sell or rent a dwelling to any person because of his race, color, religion or national origin. People with disabilities and families with children were added to the list of protected classes by the Fair Housing Amendments Act of 1988.
2. Discrimination against a person in the terms, conditions or privilege of the sale or rental of a dwelling.
3. Advertising the sale or rental of a dwelling indicating preference of discrimination based on race, color, religion or national origin (and, as of 1988, people with disabilities and families with children.)
4. Coercing, threatening, intimidating, or interfering with a person's enjoyment or exercise of housing rights based on discriminatory reasons or retaliating against a person or organization that aids or encourages the exercise or enjoyment of fair housing rights.