See Clause 13 in the MBA and Clause 22 in the HIA
Link: https://drive.google.com/drive/folders/ ... sp=sharing
Thanks HTN, read and horrified by the variation clause 1 (h) anything the builder could not have foreseen. There is no way anyone should sign that. That should be limited to latent conditions which are underground, but the way that is written there is a possibility that the builder could claim increased trade and material prices because the havent foreseen them.
need proper legal advice, but doesnt sound good