If you fail to do something you must legally do, your consent may be open to a legal challenge in the Land and Environment Court. Such challenges can be very costly in terms of lost time and legal costs.
If an application is made, which provides false or misleading information and results in development consent being granted, based on that false information, then not only can the consent be found void, if challenged, but the applicant can be prosecuted for providing that false and misleading information. See, clause 283 of the Environmenal Planning and Assessment Regulation 2000.
All current State Acts and Regulations can be accessed through the NSW Government's legislation website. Unfortunately, the process is a legal process as much as it is a merit assessment process. None can avoid the process without severe consequences.