OFCCP recently published the following FAQ to address this question: How should contractors handle counting employees and/or applicants who identify as a gender other than male or female such as Gender X as is recognized in California? Those contractors that must develop and maintain Affirmative Action Programs under Executive Order 11246 are required to invite all applicants and employees to voluntarily self-identify their gender (as well as their race and ethnicity). OFCCP has not mandated a particular method for a contractor to obtain information about a person's gender. If an employee or applicant chooses to self-identify as non-binary, or as a gender other than male or female, the contractor must still include the individual in its AAP submission. However, the contractor may exclude that individual's data from the gender-based analyses required by OFCCP's regulations. OFCCP's FAQs specify that a contractor may not ask applicants or employees for documentation to prove their gender identity or transgender status.
You can use this OFCCP audit checklist to ensure you're doing what is required to maintain OFCCP's regulations including VEVRAA, Section 503, and EO 11246. Or request a demo to streamline your compliance and recruiting efforts.