1. By way of derogation from Article 21(1), the verifier may decide to carry out a virtual site visit for the purpose of verifying an aircraft operator's report in other cases than those covered by Article 34a. The verifier's decision to carry out a virtual site visit shall be based on the outcome of the risk analysis and after determining that all relevant data can be remotely accessed by the verifier. The verifier shall inform the aircraft operator of its decision to carry out a virtual site visit without undue delay.

2. The verifier shall take measures to reduce the verification risk to an acceptable level to obtain reasonable assurance that the aircraft operator's report is free from material misstatements.

3. In other cases than those covered by Article 34a, the verifier shall always carry out a physical site visit in any of the following situations:

(a) when the aircraft operator's emission report is verified for the first time by the verifier;