14 CFR § 107.49 - Preflight familiarization, inspection, and actions for aircraft operation.
Prior to flight, the remote pilot in command must:
(a) Assess the operating environment, considering risks to persons and property in the immediate vicinity both on the surface and in the air. This assessment must include:
(1) Local weather conditions;
(2) Local airspace and any flight restrictions;
(3) The location of persons and property on the surface; and
(4) Other ground hazards.
(b) Ensure that all persons directly participating in the small unmanned aircraft operation are informed about the operating conditions, emergency procedures, contingency procedures, roles and responsibilities, and potential hazards;