Pretoria - The application by the State for leave to appeal Oscar Pistorius's sentence and conviction is not an easy task, Prosecutor Gerrie Nel told the High Court in Pretoria on Tuesday.
"It's an exception, it's my first...We do it with the utmost respect for the court...it wasn't a decision lightly taken."
Nel said he would not argue the case again but focus on the issue at hand.
Pistorius was not in court on Tuesday, but he was represented by his lawyers Barry Roux and Brian Webber.
The State has filed papers calling for a heavier conviction and harsher sentence to be imposed on the paralympic athlete.
He said he thought she was an intruder.
Neither Pistorius's relatives nor the Steenkamps were in court on Tuesday.
On 21 October, Judge Thokozile Masipa jailed Pistorius for five years for culpable homicide.
For discharging a firearm at Tasha's restaurant in Sandton, Johannesburg, in January 2013, he was sentenced to three years in jail, suspended for five years.
On Tuesday, Nel said the sentence was "shockingly inappropriate".
Masipa was not flanked by her assessors as during the trial and would deal with the application alone.
Three cameras were set up in court - one at the back and two on either side of the front of the court.