Which of the following characteristics is NOT protected under federal law for equal opportunity in the Postal Service?

The characteristic that is not protected under federal law for equal opportunity in the Postal Service is age under 40. The Age Discrimination in Employment Act (ADEA) specifically protects individuals age 40 and older from discrimination. This means that those who are younger than 40 do not have the same federal protections against age discrimination in the workplace, including within entities like the Postal Service.

By contrast, race, religion, and gender identity are all safeguarded characteristics under various federal laws, including Title VII of the Civil Rights Act and other related statutes. These laws are designed to prevent discrimination based on these specific attributes, ensuring that all individuals have equal access to employment opportunities regardless of their race, religious beliefs, or gender identity. Understanding these distinctions is crucial for recognizing the framework of protections offered under federal law.