The adequacy of MBZ procedures to ensure the safety of Instrument Flight Rules (IFR), Regular Public Transport (RPT) and charter aircraft has been questioned several times since their inception in 1991. The former Bureau of Air Safety Investigation (BASI) recommended in 1993 that, to enhance safety within MBZs (then called MTAFs), areas such as pilot education and training, along with stricter surveillance and enforcement of procedural compliance, be reviewed. BASI further recommended in 1997 that options for pilots to confirm the correct operation of communication equipment be examined. The current study reviews the available data for airspace-related occurrences in MBZs since 1994. Given the limited detail available for the majority of occurrences, caution must be used when interpreting the results of the analysis.