Any state civil service employee or applicant for state civil service employment who reasonably believes that he or she has been subjected to discrimination, harassment, or retaliation based on his or her medical condition or mental or physical disability, or denied reasonable accommodation for a known physical or mental disability in employment shall first file a written complaint with the appointing power's Equal Employment Opportunity Office, or other office or individual designated by the appointing power to investigate such complaints, prior to filing a discrimination complaint with the SPB.