Under 14 CFR § 89.110(a)(1), a standard remote identification unmanned aircraft must broadcast its remote identification message elements —

Why: 14 CFR § 89.110(a)(1) requires that, from takeoff to shutdown, the standard remote identification unmanned aircraft must broadcast the message elements of § 89.305.

• No altitude threshold triggers or exempts the RID broadcast requirement; it runs continuously from takeoff to shutdown regardless of the aircraft's altitude.
• RID broadcast is continuous and automatic, not sent on request; § 89.110(a)(1) imposes no on-demand condition tied to an ATC query.