Yes. If a criterion screens out or tends to screen out individuals with disabilities, it may only be used if necessary for the provision of the services. For instance, it would be a violation for a retail store to have a rule excluding all deaf persons from entering the premises, or for a movie theater to exclude all individuals with cerebral palsy. More subtle forms of discrimination are also prohibited. For example, requiring presentation of a driver's license as the sole acceptable means of identification for purposes of paying by check could constitute discrimination against individuals with vision impairments. This would be true if such individuals are ineligible to receive licenses and the use of an alternative means of identification is feasible.