At the end of the day doe just want to have holes drilled and...

At the end of the day doe just want to have holes drilled and projects completed to reap the benefits. Subject to doe has to be included as all asx statements regarding projects can become legal docs. If the unforeseen circumstances do occur they have their u know what's covered.
I'm a physio mate and even if the odds are a million to one the possibility of complications of treatment needs to be discussed or at the very least discussed. It puts the onus back on the customer, in this case the holder.