(1) if he would be justified in using force against the other under Section 9.31;

(2) if a reasonable person in the actor's situation would not have retreated; and

(3) when and to the degree he reasonably believes the deadly force is immediately necessary:

(A) to protect himself against the other's use or attempted use of unlawful deadly force; or

(B) to prevent the other's imminent commission of aggravated kidnapping, murder, sexual assault, aggravated sexual assault, robbery, or aggravated robbery.

(b) [added 9/1/95] The requirement imposed by Subsection (a)(2) does not apply to an actor who uses force against a person who is at the time of the use of force committing an offense of unlawful entry in the habitation of the actor.