§ 15.10 Requirements for criminal liability in general and for offenses 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."