Under FIDIC Red Book 2017, Clause 21 (Dispute Avoidance/Adjudication Board), particularly Sub-Clause 21.3, provides for the DAAB’s role in dispute avoidance, including informal assistance during site visits. This is a proactive mechanism designed to resolve issues before they escalate into formal disputes.

Key procedural requirements include: (1) both Parties must agree that they want DAAB involvement (Option A), (2) a joint written request must be submitted to the DAAB before assistance is provided (Option C), and (3) both Parties must be present during any informal discussions to ensure transparency and fairness (Option D). These steps ensure neutrality, equal participation, and procedural integrity.

Option B is incorrect and therefore the correct answer to the question. The Engineer has no formal role in authorizing or issuing a “non-objection letter” for DAAB informal assistance. The DAAB operates independently of the Engineer, and its involvement is strictly based on joint agreement between the Employer and Contractor. Introducing Engineer approval would contradict the independence and dispute avoidance function of the DAAB.

Thus, Option B does not belong to the required steps and is not supported by FIDIC provisions.