Subsequent Deferral 12 months effect rule

[Guest Elkay]

409A subsequent deferral rule says:

1. The subsequent deferral election must be made at least 12 months before the originally scheduled payment date;

2. The subsequent deferral election may not go into effect until at least 12 months after the election is made; and

3. The new payment date must be at least five years after the originally scheduled payment date.

Don't rules 1 and 3 make rule 2 superfluous?

Are there any situations where subsequent deferral is revokable / revoked within the 12 months after it was made?

If a person is terminated prior to 12 months after making subsequent deferral, is the subsequent deferral still valid (in situations where there is no specific separation related deferral election)?