The situation was constantly changing, as was evident with the offensive by Iraq to retake Mosul from Isis.
"As a responsible contributor we have to be adaptable."
He said Al Taqaddum was a secure coalition airbase in Anbar province.
"The base is a protected coalition site and comprehensive force protection is in place."
Brownlee said the new training would be for short periods of about two weeks.
It would not change the size of the overall deployment or add any cost.
The extension of the New Zealand role to train armed police as well as troops was announced in June. At the same time the deployment of 143 perssonnel was extended to November 2018, and the travel to Besmaya approved.
The deployment began in May 2015 and was originally due to end two years later.
The joint Australian-New Zealand mission at Camp Taji has already trained more than 12,000 Iraqis.
Australian troops and British troops will be invovled in the training of the armed police at Taqaddum, too.