The principle drives the punishment for crimes to focus only on the restriction of liberty and to not deprive the sentenced offender of other rights, where feasible.
A similar description of the principle is provided by Marianne Vollan, Director General of the Norwegian Correctional Service, in an interview.
[4] The article Maintaining normality when serving a prison sentence in the digital society in the Croatian Medical Journal discusses the practice of the normality principle in Norway.
It notes that the restrictions on Internet use and telephone use runs against the normality principle, and may prevent inmates from learning digital skills necessary to reintegrate into society.
Are Høidal, the governor of Halden Prison (who is also interviewed in the episode) has also written an article for the Federal Sentencing Register describing the normality principle in action in Halden Prison.