"Protected Class"

"In United States Federal anti-discrimination law, a protected class is a characteristic of a person which cannot be targeted for discrimination. The following characteristics are considered "Protected Classes" by Federal law: Race – Civil Rights Act of 1964."

https://en.wikipedia.org/wiki/Protected_class

Oregon Protected Classes side by side with Federal Protected classes:

http://www.oregon.gov/BOLI/TA/docs/T_FAQ_Protected_Classes.pdf