1. Subject to paragraph 2, in these Regulations, “medical certificate”, in relation to a person driving or riding in a vehicle, means—
(a)a valid certificate signed by a medical practitioner to the effect that it is inadvisable on medical grounds for him to wear a seat belt, or
(b)a valid certificate to such effect issued by the authority having power to issue such a certificate under the law of another member State corresponding to these Regulations.
2. A certificate shall not be regarded as a medical certificate in relation to a person driving or riding in a vehicle for the purposes of these Regulations unless—
(a)it specifies its period of validity and bears the symbol shown in Part II of this Schedule; or
(b)the person is aged under 14 years and the vehicle is not a relevant vehicle.
3. Paragraph 2 does not apply in relation to a certificate issued before 1st January 1995.