Act Party leader Don Brash has apologised to John Banks for not consulting him before his speech in which he proposed decriminalising cannabis.
Dr Brash said he did not regret making the comments but did regret not informing his party's Epsom candidate, Mr Banks, beforehand.
"I handled it in a discourteous way with John Banks. I've apologised to him for that."
Dr Brash voiced his personal support for decriminalisation in a speech about Act's law and order policy last weekend. Although he made it clear it was a personal view rather than party policy, it prompted a strong reaction from Mr Banks, a former police minister and hardliner on law and order, raising speculation of a rift.
Asked if he would have refrained from the comments at Mr Banks' request, Dr Brash said he would have at least made it clear Mr Banks was strongly opposed. He admitted he had blindsided Mr Banks - although he had told Mr Banks he would talk about cannabis, he had not given any detail.