503 - Justification generally.

     § 503.  Justification generally.        (a)  General rule.--Conduct which the actor believes to be     necessary to avoid a harm or evil to himself or to another is     justifiable if:            (1)  the harm or evil sought to be avoided by such        conduct is greater than that sought to be prevented by the        law defining the offense charged;            (2)  neither this title nor other law defining the        offense provides exceptions or defenses dealing with the        specific situation involved; and            (3)  a legislative purpose to exclude the justification        claimed does not otherwise plainly appear.        (b)  Choice of evils.--When the actor was reckless or     negligent in bringing about the situation requiring a choice of     harms or evils or in appraising the necessity for his conduct,     the justification afforded by this section is unavailable in a     prosecution for any offense for which recklessness or     negligence, as the case may be, suffices to establish     culpability.