Although not [yet] required, this seems consistent with the recent healthcare mandates by HHS:
The Story: Evangelical organizations that partner with the U.S. Agency for International Development (USAID) to deliver humanitarian aid overseas are voicing concern and outrage over a new federal policy that "strongly encourages" all contractors to develop anti-discrimination policies covering employees' sexual orientation, says Christianity Today.Evangelical Organizations Concerned About Potential Threat to Religious Liberty – The Gospel Coalition Blog
The Background: Many Christian charities require employees to agree to adhere to Biblical standards of conduct relating to sexuality. For example, World Vision requires all their U.S. employees to sign a statement of faith and agree to a standard of conduct that limits sexuality to 'a God-ordained covenant between a man and a woman'."
"For a government agency to 'strongly encourage' us to abandon such core beliefs in our hiring policies is offensive and uncalled for," World Vision's senior vice president Kent Hill told Christianity Today. ....