Like most of the tax laws and their attendant regulations on the books the laws governing 501(c)(3) corporations are complex. Always seek the advice of counsel to make sure that your school meets fully the requirements of applicable laws. Here are some of the steps which you must take to show that your school has not discriminated.
Publish notices of non-discrimination prominently in your regional or metropolitan newspapers.
Include a photocopy of these announcements and the dates of publication as appendices to your Form 990.
Include of a notice of non-discrimination in every school publication soliciting candidates for admission.
Typically these will include the school's catalog, video, flyers and notices for publication. Include copies of these documents as appendices to the Form 990.
Include of a notice of non-discrimination in any advertisements for faculty or staff positions.
These will include newspaper advertisements, ads in trade journals or similar venues, including electronic ads which appear on the Internet. (In fact advertisements on the Web are available to such a wide audience it would be hard to imagine a more effective way of proving that you were not discriminating. Indeed it shows that you are casting the widest possible net for your prospective employees.) Once again include copies of each advertisement as an appendix to your Form 990.
Proving that your institution does not discriminate involves good record keeping. Keep copies of anything which will prove the fact that your school is proactive and fair in its efforts to comply with the letter of the law regarding non-discriminatory practices in employment and admissions.

