NBC had a number of guidelines for what radio shows could and could not contain. This volume Broadcasting in the Public Interest, from 1939, outlines those rules. This first 'Standards and Practices' booklet soon became yet another standard throughout the industry. It was 6 by 9 inches and is 80 pages long.
Involuntary manslaughter usually refers to an unintentional killing that results from recklessness or criminal negligence, or from an unlawful act that is a misdemeanor or low-level felony (such as a DUI).
The Full Court in Victoria distinguished between the two classes of homicide of murder by reckless indifference and manslaughter by criminal negligence in R v Nydam, in which malice aforethought was definitively ruled out as an element in a charge of manslaughter by criminal negligence.