Real estate refers to land, as well as anything permanently attached to the land, such as buildings and other structures. Both federal and state laws regulate real estate transactions. For example, the Federal Fair Housing Act (42 U.S.C. §§ 3601-3631) protects people involved in real estate transactions from discrimination based on race, color, religion, sex, or national origin. The Supreme Court case of Meyer v. Holley, 537 U.S. 280 (2002), illustrates how a real estate company can be held liable for violating the Federal Fair Housing Act. States also have unique real estate laws which apply only to their jurisdiction.