D.C. Mun. Regs. tit. 31, r. 31-1003
Each application (including a renewal application) shall be accompanied by a certificate from a licensed physician who is a resident of the MSA, certifying that, in, the opinion of that physician, the applicant does not have a physical or cognitive disability or disease which might make him or her an unsafe driver of a public vehicle-for-hire.
The form of the physician's certificate shall be prescribed by the Chairperson and shall provide for any additional information relating to the applicant's past or present medical history as the Chairperson may consider necessary.
The certificate shall be executed by the certifying physician within thirty (30) days of the date of filing of the application.
Each application (including a renewal application) shall also be accompanied by a certificate signed by the applicant on a form prescribed by the Chairperson certifying that, to the best of the applicant's knowledge and belief, he or she has no disease or disability which would render him or her unsafe or unsatisfactory as a driver of a public vehicle. The form may provide for additional information relating to the applicant's past or present medical history or condition.
Each applicant shall have central visual acuity of at least 20/40 in one eye, either unassisted or assisted by glasses or contact lens, and shall have hearing of at least 10/20 in one ear.
No applicant shall be considered for a license if, at the time the application is filed, the applicant is suffering from a contagious disease, epilepsy, vertigo, fainting spells, blackouts, attacks of dizziness, or other medical condition that in the opinion of the Chairperson may render the applicant unsafe or unsatisfactory as a driver of a public vehicle.
An operator's license shall not be issued or renewed under this chapter for an individual who has a mental illness, cognitive disability, or other impairment that would negatively impact his or her ability to meet the requirements of this chapter with respect to the operation of a public vehicle-for-hire, unless he or she provides a certificate from a licensed physician who is a resident of the MSA certifying that, in the opinion of that physician, the person's impairment, as may be currently treated, does not negatively impact his or her ability to meet the requirements of this chapter with respect to the operation of a taxicab. If the person's impairment, or his or her treatment, substantially changes during the period of licensure, he or she shall provide a recertification from a physician who is a resident of the MSA or shall immediately surrender his or her license to the Commission.
D.C. Mun. Regs. tit. 31, r. 31-1003