"New Zealand has a shameful history of child abuse, and this bill will make an example of adults who put their interests before those of vulnerable children around them," Mr Power said.
The law also doubles the maximum penalty for cruelty to a child from five years to 10 years' imprisonment, and extends the offence to include vulnerable adults.
The legal duty to those parents and caregivers who have a duty to provide the necessaries of life is extended to also take reasonable steps to protect a child or vulnerable adult.
Mr Power said the law would strengthen the ability of agencies to hold individuals to account for harming the most vulnerable in our community.
"It ensures that not only will the perpetrators of these acts be held accountable, but also will those members of households who witness those incidents and turn a blind eye to the abuse, or fail take to take measures to stop ongoing incidents," he said.
"But it's my hope that the biggest impact will be to help encourage those in day-to-day contact with endangered children to come forward if they know that serious abuse or neglect is taking place."
The law changes also increase the penalty for possession of an offensive weapon, including knives, from two to three years in prison. The bill passed its third reading 109 votes to 11, with the Greens, Mana Party, and independent MP Chris Carter opposed.