The Report of the Royal Commission on the Electoral System which first recommended New Zealand adopt the Mixed Member Proportional voting system was submitted to the Governor-General on 11 December 1986.
The report can be downloaded below. These are scans of the final report pages, and the quality is therefore inconsistent.
Royal Commission Report Contents (PDF 783.73 KB)
Chapter 1: Preface and introduction (PDF 276.98 KB)
Chapter 2: The voting system (PDF 2.44 MB)
Chapter 3: Māori representation (PDF 1.29 MB)
Chapter 4: The number of members of Parliament (PDF 499.35 KB)
Chapter 5: Boundary determination (PDF 854.78 KB)
Chapter 6: Term of Parliament (PDF 471.93 KB)
Chapter 7: The use of referenda (PDF 533.39 KB)
Chapter 8: Political finance (PDF 1.76 MB)
Appendix a.pdf (PDF 3.59 MB)
Appendix b.pdf (PDF 4.02 MB)
Appendices c and d.pdf (PDF 282.71 KB)