Can natural language control ambiguity?

What does "because of" mean?

It shall be unlawful for an employer to limit, segregate, or classify his employees in any way which would deprive or tend to deprive any individual of employment opportunities or otherwise adversely affect his status as an employee, because of such individual's age. Age Discrimination in Employment Act of 1967 (Pub. L. 90-202)

U.S. Supreme Court (Smith v. City of Jackson, Mississippi, 544 US ___ (2005)).