The project manager should first clarify expectations with the client before taking any further action. Open communication is a key part of stakeholder engagement and ensures alignment on mandatory safety requirements that may not be fully understood by all parties.

Per the PMBOK® Guide – Seventh Edition (Stakeholder and Planning Performance Domains), stakeholder consultation helps address risks and clarify scope elements like compliance. Assuming or ignoring requirements could lead to regulatory breaches.

Option A is inappropriate and risky.

Option C may cause unnecessary cost or complexity.

Option D is premature without engaging the client first.