--- title: "ATCO.C.001 – ATCO.C.065: SUBPART C – REQUIREMENTS FOR INSTRUCTORS AND ASSESSORS (ANNEX I – PART ATCO – REQUIREMENTS FOR THE LICENSING OF AIR TRAFFIC CONTROLLERS, ATCO) — rule index · Avioverse" description: "ATCO.C.001 – ATCO.C.065, Regulation (EU) 2015/340. Theoretical training shall only be carried out by appropriately qualified instructors." url: "https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c" --- # SUBPART C – REQUIREMENTS FOR INSTRUCTORS AND ASSESSORS ANNEX I – PART ATCO – REQUIREMENTS FOR THE LICENSING OF AIR TRAFFIC CONTROLLERS · Air Traffic Controllers' Licensing and Certification · Regulation (EU) 2015/340 · ATCO.C.001 – ATCO.C.065 On this page 1. ## [ATCO.C.001 Theoretical instructors](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-001) Theoretical training shall only be carried out by appropriately qualified instructors. [GM1 ATCO.C.001(b)(1) Theoretical instructors](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-001#gm1-atco-c-001-b-1) [AMC1 ATCO.C.001(b)(2) Theoretical instructors](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-001#amc1-atco-c-001-b-2) 2. ## [ATCO.C.005 Practical instructors](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-005) A person shall only carry out practical training when he/she holds an air traffic controller licence with an on-the-job training instructor (OJTI)… 3. ## [ATCO.C.010 On-the-job training instructor (OJTI) privileges](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-010) Holders of an OJTI endorsement are authorised to provide practical training and supervision on operational working positions for which a valid unit… [GM1 ATCO.C.010(c) On-the-job training instructor (OJTI) privileges](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-010#gm1-atco-c-010-c) 4. ## [ATCO.C.015 Application for on-the-job training instructor endorsement](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-015) Applicants for the issue of an OJTI endorsement shall: hold an air traffic controller licence with a valid unit endorsement; [GM1 ATCO.C.015(b) Application for on-the-job training instructor endorsement](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-015#gm1-atco-c-015-b) 5. ## [ATCO.C.020 Validity of on-the-job training instructor endorsement](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-020) The OJTI endorsement shall be valid for a period of three years. [GM1 ATCO.C.020(b) Validity of on-the-job training instructor endorsement](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-020#gm1-atco-c-020-b) 6. ## [ATCO.C.025 Temporary OJTI authorisation](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-025) When compliance with the requirements provided for in ATCO.C.010(b)(2) is not possible, the competent authority may grant temporary OJTI authorisation… [AMC1 ATCO.C.025(a) Temporary OJTI authorisation](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-025#amc1-atco-c-025-a) [GM1 ATCO.C.025(a) Temporary OJTI authorisation](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-025#gm1-atco-c-025-a) 7. ## [ATCO.C.030 Synthetic training device instructor (STDI) privileges](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-030) Holders of an STDI endorsement are authorised to provide practical training on synthetic training devices: [GM1 ATCO.C.030(a)(1) Synthetic training device instructor (STDI) privileges](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-030#gm1-atco-c-030-a-1) [GM1 ATCO.C.030(c)(1) Synthetic training device instructor (STDI) privileges](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-030#gm1-atco-c-030-c-1) [GM1 ATCO.C.030(c)(2) Synthetic training device instructor (STDI) privileges](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-030#gm1-atco-c-030-c-2) 8. ## [ATCO.C.035 Application for synthetic training device instructor endorsement](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-035) Applicants for the issue of an STDI endorsement shall: have exercised the privileges of an air traffic controller licence in any rating for at least two… [GM1 ATCO.C.035(a) Application for synthetic training device instructor (STDI) endorsement](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-035#gm1-atco-c-035-a) 9. ## [ATCO.C.040 Validity of synthetic training device instructor endorsement](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-040) The STDI endorsement shall be valid for a period of three years. [GM1 ATCO.C.040(b) Validity of synthetic training device instructor endorsement](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-040#gm1-atco-c-040-b) 10. ## [ATCO.C.045 Assessor privileges](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-045) A person shall only carry out assessments when he/she holds an assessor endorsement. [AMC1 ATCO.C.045(c)(2) Assessor privileges](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-045#amc1-atco-c-045-c-2) 11. ## [ATCO.C.050 Vested interests](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-050) Assessors shall not conduct assessments whenever their objectivity may be affected. 12. ## [ATCO.C.055 Application for assessor endorsement](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-055) Applicants for the issue of an assessor endorsement shall: have exercised the privileges of an air traffic controller licence for at least two years; 13. ## [ATCO.C.060 Validity of assessor endorsement](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-060) The assessor endorsement shall be valid for a period of three years. [GM1 ATCO.C.060(b) Validity of assessor endorsement](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-060#gm1-atco-c-060-b) 14. ## [ATCO.C.065 Temporary assessor authorisation](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-065) When the requirement provided for in ATCO.C.045(d)(1) cannot be met, the competent authority may authorise holders of an assessor endorsement issued in… [GM1 ATCO.C.065(b) Temporary assessor authorisation](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-065#gm1-atco-c-065-b) [GM1 ATCO.C.065(c) Temporary assessor authorisation](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-065#gm1-atco-c-065-c) [AMC1 ATCO.C.065(d) Temporary assessor authorisation](https://avioverse.aero/regulations/easa/atco/part-atco-requirements-for-the-licensing-of-air/subpart-c/atco-c-065#amc1-atco-c-065-d) Consolidated from the EASA Easy Access Rules (revision 14 Jun 2024, extracted 13 Oct 2026) for convenience. 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