It's thought a Court of Appeal decision finding the Waitangi Tribunal could summon ACT MP Karen Chhour doesn't set a precedent for future cases. 

The decision overturned a High Court ruling which found the Children's Minister did not have to front with her reasoning for removing Section 7AA from the Oranga Tamariki Act.  

Massey University Law Professor Chris Gallavin told Mike Hosking that lots of ministers have given evidence before the tribunal in the past. 

He says it's a bit of a storm in a teacup. 

Gallavin says there's lot of agreement between the High Court and Court of Appeal, and they just took different views on one point. 

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