To conduct Category 1 operations under 14 CFR § 107.110, the small unmanned aircraft must—

Why: 14 CFR § 107.110(a) requires a Category 1 aircraft to weigh 0.55 pounds or less throughout the operation, including everything on board or attached, and to have no exposed rotating parts that would lacerate human skin upon impact.

• 55 pounds is the part 107 definition ceiling for "small unmanned aircraft" generally (§ 107.3), not the 0.55-pound Category 1 threshold; Category 1 also has no declaration-of-compliance requirement — AC 107-2A § 8.3.4.2, p. 8-3, states there are no applicant requirements for Category 1.
• Category 1 has no labeling requirement. AC 107-2A § 8.11.1, p. 8-29, states the FAA does not require labeling of Category 1 aircraft; labeling is a Category 2/3 requirement under § 107.135.