The purpose of a PSO is to protect at-risk people from violence, harassment or intimidation and give a victim of abuse time to get support or a protection order.
It is issued when the police have reasonable grounds to believe that family violence has occurred or may occur.
When the law changes a PSO will last for up to 10 days, double the current five, and police will be able to mandate programmes where the perpetrator will have to make contact with agencies to change their behaviour.
Brown said the test was about working with the families and collaborating with different agencies such as Alcoholics Anonymous or Problem Gambling to provide help and working on people being safe.
After the aggressor agrees to the test, social workers and other support people go out and talk to them about what is required to help that person make change.
Brown says the problem in Hawke's Bay is inter-generational, and largely male dominated.
He said the problem in high-risk families would not disappear overnight, but initiative needs to be taken to engage and earn trust.
"If we change the behaviour of one person it is worth it. We want people to be safe, reach out to us."