Sections 107.33, 107.35 and 107.36 set the crew rules and the hazardous material ban. Here is the rule, the exam traps and practice questions, with the FAA source under each answer.
A person may not manipulate flight controls or act as remote pilot in command or visual observer for more than one unmanned aircraft at once (107.35). A small unmanned aircraft may not carry hazardous material, as 49 CFR 171.8 defines it (107.36). When a visual observer is used, the crew must keep effective communication and scan for hazards (107.33).
Sources: 14 CFR 107.33 · 14 CFR 107.35 · 14 CFR 107.36
§ 107.33 Visual observer.
If a visual observer is used during the aircraft operation, all of the following requirements must be met:
(a) The remote pilot in command, the person manipulating the flight controls of the small unmanned aircraft system, and the visual observer must maintain effective communication with each other at all times.
Read all of § 107.33
(b) The remote pilot in command must ensure that the visual observer is able to see the unmanned aircraft in the manner specified in § 107.31.
(c) The remote pilot in command, the person manipulating the flight controls of the small unmanned aircraft system, and the visual observer must coordinate to do the following: (1) Scan the airspace where the small unmanned aircraft is operating for any potential collision hazard; and (2) Maintain awareness of the position of the small unmanned aircraft through direct visual observation.
§ 107.35 Operation of multiple small unmanned aircraft.
A person may not manipulate flight controls or act as a remote pilot in command or visual observer in the operation of more than one unmanned aircraft at the same time.
[Amdt. 107-8, 86 FR 4382, Jan. 15, 2021]
§ 107.36 Carriage of hazardous material.
A small unmanned aircraft may not carry hazardous material. For purposes of this section, the term hazardous material is defined in 49 CFR 171.8.
Sources: 14 CFR 107.33 (eCFR, current as of 2026-10-21) · 14 CFR 107.35 (eCFR, current as of 2026-10-21) · 14 CFR 107.36 (eCFR, current as of 2026-10-21)
Similar to the FAA test, not the actual test questions.
Practice question 1
(According to 107.35, a person may not operate, or act as remote PIC, or visual observer in the operation of more than one unmanned aircraft at the same time.)
FAA source: 14 CFR 107.35
Practice question 2
(According to 107.36, a sUAS may not carry hazardous material. Hazardous material means a substance or material capable of posing an unreasonable risk to health, safety, and property. The term includes hazardous substances, hazardous wastes, marine pollutants, elevated temperature materials (…).)
FAA source: 14 CFR 107.36
Practice question 3
14 CFR 107.205 lists the waivable sections: 107.25, 107.29(a)(2) and (b), 107.31, 107.33, 107.35, 107.37(a), 107.39, 107.41, 107.51 and 107.145. 107.36 is not on the list. Waivers of 107.25 or 107.31 are also never issued to carry another person's property for compensation or hire.
FAA sources: 14 CFR 107.205 · 14 CFR 107.36
Yes. 107.35 is on the list of Part 107 rules a certificate of waiver may authorize a deviation from, but 107.36 is not on that list.
Source: 14 CFR 107.205