--- title: "ATM/ANS.OR.C.001 – ATM/ANS.OR.C.005: SUBPART C — SPECIFIC ORGANISATION REQUIREMENTS FOR SERVICE PROVIDERS OTHER THAN ATS PROVIDERS (ATM/ANS.OR.C) (Part-ATM/ANS.OR) — rule index · Avioverse" description: "ATM/ANS.OR.C.001 – ATM/ANS.OR.C.005, Regulation (EU) 2017/373. This Subpart establishes the requirements to be met by the service provider other than the…" url: "https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c" --- # SUBPART C — SPECIFIC ORGANISATION REQUIREMENTS FOR SERVICE PROVIDERS OTHER THAN ATS PROVIDERS (ATM/ANS.OR.C) ANNEX III COMMON REQUIREMENTS FOR SERVICE PROVIDERS (Part-ATM/ANS.OR) · Air Traffic Management / Air Navigation Services · Regulation (EU) 2017/373 · ATM/ANS.OR.C.001 – ATM/ANS.OR.C.005 On this page 1. ## [ATM/ANS.OR.C.001 Scope](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-001) This Subpart establishes the requirements to be met by the service provider other than the air traffic services provider, in addition to the requirements… 2. ## [ATM/ANS.OR.C.005 Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005) For any change notified in accordance with point ATM/ANS.OR.A.045(a)(1), the service provider other than the air traffic services provider shall: [GM1 ATM/ANS.OR.C.005(a)(1) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#gm1-atm-ans-or-c-005-a-1) [GM2 ATM/ANS.OR.C.005(a)(1) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#gm2-atm-ans-or-c-005-a-1) [GM3 ATM/ANS.OR.C.005(a)(1) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#gm3-atm-ans-or-c-005-a-1) [GM4 ATM/ANS.OR.C.005(a)(1) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#gm4-atm-ans-or-c-005-a-1) [GM5 ATM/ANS.OR.C.005(a)(1) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#gm5-atm-ans-or-c-005-a-1) [GM6 ATM/ANS.OR.C.005(a)(1) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#gm6-atm-ans-or-c-005-a-1) [AMC1 ATM/ANS.OR.C.005(a)(2) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#amc1-atm-ans-or-c-005-a-2) [AMC2 ATM/ANS.OR.C.005(a)(2) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#amc2-atm-ans-or-c-005-a-2) [AMC3 ATM/ANS.OR.C.005(a)(2) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#amc3-atm-ans-or-c-005-a-2) [AMC4 ATM/ANS.OR.C.005(a)(2) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#amc4-atm-ans-or-c-005-a-2) [AMC5 ATM/ANS.OR.C.005(a)(2) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#amc5-atm-ans-or-c-005-a-2) [AMC6 ATM/ANS.OR.C.005(a)(2) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#amc6-atm-ans-or-c-005-a-2) [GM1 ATM/ANS.OR.C.005(a)(2) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#gm1-atm-ans-or-c-005-a-2) [GM2 ATM/ANS.OR.C.005(a)(2) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#gm2-atm-ans-or-c-005-a-2) [GM3 ATM/ANS.OR.C.005(a)(2) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#gm3-atm-ans-or-c-005-a-2) [AMC1 ATM/ANS.OR.C.005(b)(1) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#amc1-atm-ans-or-c-005-b-1) [GM1 ATM/ANS.OR.C.005(b)(1) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#gm1-atm-ans-or-c-005-b-1) [GM2 ATM/ANS.OR.C.005(b)(1) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#gm2-atm-ans-or-c-005-b-1) [AMC1 ATM/ANS.OR.C.005(b)(2) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#amc1-atm-ans-or-c-005-b-2) [GM1 ATM/ANS.OR.C.005(b)(2) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/atm-ans-or-c-005#gm1-atm-ans-or-c-005-b-2) 3. ## [GM1 to AMC2 ATM/ANS.OR.C.005(a)(2) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/gm1-to-amc2-atm-ans-or-c-005-a-2-safety-support-assessment-and-assurance-of) COMPLETENESS OF THE ARGUMENT (a) Sufficiency of specifications The way the service specification is arrived at is not of particular interest in a safety… 4. ## [GM1 to AMC6 ATM/ANS.OR.C.005(a)(2) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/gm1-to-amc6-atm-ans-or-c-005-a-2-safety-support-assessment-and-assurance-of) ASSURANCE — SOFTWARE ASSURANCE PROCESS (a) The term ‘correct and complete software verification’ is understood to be all software safety requirements… 5. ## [GM2 to AMC6 ATM/ANS.OR.C.005(a)(2) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/gm2-to-amc6-atm-ans-or-c-005-a-2-safety-support-assessment-and-assurance-of) ASSURANCE — SOFTWARE ASSURANCE LEVELS (a) The assurance required by AMC6 ATM/ANS.OR.C.005(a)(2) can be provided with different levels of confidence… 6. ## [GM3 to AMC6 ATM/ANS.OR.C.005(a)(2) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/gm3-to-amc6-atm-ans-or-c-005-a-2-safety-support-assessment-and-assurance-of) ASSURANCE — SOFTWARE ASSURANCE LEVELS ALLOCATION The process to allocate a SWAL to a software consistently with its foreseen criticality, as identified… 7. ## [GM4 to AMC6 ATM/ANS.OR.C.005(a)(2) Safety support assessment and assurance of changes to the functional system](https://avioverse.aero/regulations/easa/atm-ans/annex-iii-common-requirements-for-service/subpart-c/gm4-to-amc6-atm-ans-or-c-005-a-2-safety-support-assessment-and-assurance-of) ASSURANCE — EXAMPLES OF EXISTING INDUSTRIAL STANDARDS (a) The service provider is responsible for the definition of the software assurance processes. Consolidated from the EASA Easy Access Rules (revision 12 Mar 2025, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use. Share [LinkedIn](https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Favioverse.aero%2Fregulations%2Feasa%2Fatm-ans%2Fannex-iii-common-requirements-for-service%2Fsubpart-c)[X](https://twitter.com/intent/tweet?url=https%3A%2F%2Favioverse.aero%2Fregulations%2Feasa%2Fatm-ans%2Fannex-iii-common-requirements-for-service%2Fsubpart-c\&text=SUBPART%20C%20%E2%80%94%20SPECIFIC%20ORGANISATION%20REQUIREMENTS%20FOR%20SERVICE%20PROVIDERS%20OTHER%20THAN%20ATS%20PROVIDERS%20\(ATM%2FANS.OR.C\)%20%E2%80%94%20ATM%2FANS)