Can ribbed raft waffle slabs be built on less than good ground?

The New Zealand Building Code defines the bearing strength of 'good ground' for a traditional slab as a minimum of 100kPa over the entire building platform. The superior strength of a ribbed raft waffle slab reduces this minimum bearing strength to:

The application of Poly Palaces ribbed raft waffle slab must be in accordance with engineering specifications from a consulting Engineer.