In order to comply with the code-sharing requirements of Regulation (EU) No. 965/2012, it is not enough to hold only a TCO authorisation. Because they involve EU rules as well as ICAO standards, the code-share provisions will apply in addition to the requirements of Part-TCO. Therefore, a third-country operator who shares codes with an EU carrier will be subject to both sets of requirements and their related AMC [ORO.AOC.115/ARO.OPS.105]. In practice, the third-country operator will be obliged to undergo comprehensive audits for the initial and continuous verification of compliance with the applicable ICAO Standards [AMC1 ORO.AOC.115(a)(1)]. The audits can be performed either by the EU operator itself, or by a third-party provider [AMC2 ORO.AOC.115(b)], which includes the possibility of using industry standards such as IOSA. The audit will focus on the operational, management and control systems of the TCO [AMC1 ORO.AOC.115(a)(1)]. Ensuring that the code-sharing third-country operator continues to comply with the applicable ICAO Standards, will be achieved through a code-share audit programme [AMC1 ORO.AOC.115(b)].