If your build is non compliant with relevant Codes then alternate solutions are acceptable under certain circumstances
Process Guidelines Here
1.Prepare a performance based design brief
2.Carry out analysis, Modelling or Testing
3.Collate and Evaluate Results
4.Prepare the final Report
Development of Performance Solutions
If you believe your Build is non-compliant and the proposed Alternate Solution is unacceptable and poses a risk
you now have recourse, you will also be required to collect/provide Data and Proofs during the build, ie photos, measurements, calculations, engineering,etc
More to follow
Cheers
Chris