of strict liability and mental culpability.
The minimal requirement for criminal liability is the performance by a
person of conduct which includes a voluntary act or the omission to
perform an act which he is physically capable of performing. If such
conduct is all that is required for commission of a particular offense,
or if an offense or some material element thereof does not require a
culpable mental state on the part of the actor, such offense is one of
"strict liability." If a culpable mental state on the part of the actor
is required with respect to every material element of an offense, such
offense is one of "mental culpability."