What are the three rules for using turn signals described in the AAMVA manual?

49 CFR 383.111(a)(8) (Communicating); AAMVA CDL Manual Section 2.5.1, p.2-11

Signaling early and keeping the signal on through the whole turn gives other drivers time to react, while forgetting to cancel it afterward can confuse drivers behind you into thinking you're about to turn again. These three rules work as a sequence, not individual options, and the exam tests them as a set.