Your installation guide is for the weatherboard profile and timber species not the shou sugi ban finish. It is important to note that councils consider Shou Sugi Ban as a finish to your weatherboard like an oil stain. It is the feed stock or timber cladding that the council is concerned with.
When you are supplied timber from one of The Blackwood Project's Mills we supply you with their Producer Statement and Branz or Codemark. This is a document verifying the timber species and weatherboard profile as suitable for timber cladding and durable for New Zealand conditions.