Article 11 Conditions for maintaining ratings and keeping endorsements valid
United Kingdom
Unit endorsements shall be valid for an initial period of 12 months. The validity of such endorsements shall be extended for the following 12 months if the air navigation service provider demonstrates that:
the applicant has been exercising the privileges of the licence for a minimum number of hours, as indicated in the approved unit competence scheme, throughout the previous 12 months;
the applicant's competence has been assessed in accordance with Part C of Annex II; and
the applicant holds a valid medical certificate.
The minimum number of working hours, leaving aside instruction tasks, required to maintain the validity of the unit endorsement may be reduced for on-the-job training instructors in proportion to the time spent instructing trainees on the working positions for which the extension is applied.
Where unit endorsements cease to be valid, a unit training plan must be successfully completed so as to revalidate the endorsement.
The holder of a rating or rating endorsement who has not been providing air traffic control services associated with that rating or rating endorsement for any period of four consecutive years may only commence unit training in that rating or rating endorsement after appropriate assessment as to whether he/she continues to satisfy the conditions of that rating or rating endorsement, and after satisfying any training requirements that result from this assessment.
The language proficiency of the applicant shall be formally evaluated at regular intervals, except in the case of applicants who have demonstrated proficiency level six.
This interval shall be no longer than three years for applicants who demonstrate proficiency level four and no longer than six years for applicants who demonstrate proficiency level five.
The instructor endorsement shall be valid for a renewable period of 36 months.