14.6  Failure of a Medical Examination
A controller or a student air traffic controller who fails his medical examination shall not exercise the privileges of his ATC licence.
If the medical certificate in the licence has not already expired the controller shall surrender the certificate to the medical examiner or forward it to the CAA Medical Department.
The licence holder shall not exercise the privileges of his licence until he is again passed fit and holds a valid medical certificate.

14.7  Appeal Against an Assessment of Fitness to Hold a Medical Certificate
If an applicant for a medical certificate has failed the medical examination, he/she may appeal against the medical decision. The CAA Medical Appeal Procedure is available from the CAA Medical Department and CAA website.
14.8  Psychoactive Substances (Alcoholic Drink and Problematical Drugs and Medicines)
An air traffic controller who is providing an air traffic control service while under the influence of psychoactive substances may not be aware that his or her judgement and skill have been degraded to the extent that the service being provided is unsafe. This may be the case where psychoactive substances are being abused, or where medicines have been prescribed by a doctor, or non prescription medicines obtained for a minor illness.
The CAA Medical Department ensures that licence holders are able to obtain the necessary advice and/or information to enable them to decide if they should, or should not, provide an ATC service while taking specific medicines.
14.8.1  Requirement
The holder of a student or air traffic controller licence shall not provide an air traffic control service while under the influence of psychoactive substances, including any medicine, that might have a negative influence on his capacity to provide a safe air traffic control service.
Student and air traffic controller licence holders shall ensure they do not take medicine before or while providing an air traffic control service that would have a detrimental effect on their operational performance.
Unit management shall have a process for monitoring controllers for psychoactive substance abuse. A controller who is suspected of being under the influence of psychoactive substances shall be immediately withdrawn from operational duty by the unit and the CAA Medical Department advised of the circumstances.

14.9  Roles and Responsibilities
14.9.1  Holders of Student and Air Traffic Controller Licences
Student and air traffic controller licence holders shall ensure that:
a) they do not provide an air traffic control service if they are under the influence of psychoactive substances that might have a negative influence on their capacity to provide a safe air traffic control service;
b) they consult with their doctor on the likely effect on their operational efficiency of any medicine they have been prescribed;
c) before taking any non prescription medicine they consult the Aeronautical Information Circular issued by the CAA Medical Department titled ‘Medication and Air Traffic Control’.
NOTE:  Any student air traffic controller or air traffic controller who is uncertain as to the likely effect of any medicine or psychoactive substances on his ability to provide a safe air traffic control service should contact the CAA Medical Department for advice.

14.9.2  Providers of Air Traffic Services
Providers of air traffic services at units where they are responsible for the provision of air traffic control services must have processes, procedures and competent personnel to ensure that student and air traffic controller licence holders:
a) are monitored for psychoactive substance abuse;
b) are withdrawn from operational duty if they are considered to be under the influence of psychoactive substances that might have a negative affect on their capacity to provide a safe air traffic control service;
　
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本文鏈接地址：CAP 744 Air Traffic Controllers – Licensing(43)