It is unlawful for an employer to discriminate in hiring, discipline, employment conditions, or termination against an apprentice or applicant for apprenticeship on the basis of race, color, creed, religion, sex, ancestry, disability, or national origin. Employers may not discriminate on the basis of blindness or partial blindness unless specific vision requirements constitute demonstrated and bona fide occupational qualifications for effective work performance (SD Cod. Laws Sec. 20-13-10, Sec. 20-13-10.1).