The decision to give victims of crime the right to appeal against decisions not to charge was prompted by a Court of Appeal ruling involving a 2007 case in which the CPS decided not to bring sexual assault charges.
The decision was reversed by the Court of Appeal and in 2011 disabled man Christopher Killick was jailed for three and a half years for sexually abusing two fellow cerebral palsy sufferers.
The court stated "as a decision not to prosecute is in reality a final decision for a victim, there must be a right to seek a review of such a decision".
More top news
Murder charges against an Irish nanny, who spent more than two years in prison accused of killing a baby in the USA, have been dropped.
Charities face probe after claims they may have been involved in buying and selling widower's details.
The island of Kivalina in Alaska is quickly disappearing into the ocean, watched by its 400 residents, due to climate change.