This study was conducted in the context of the regulation of professional nursing and midwifery practice in the Australian health care system. In this environment, professional regulatory authorities established by State and Territory legislation in all jurisdictions, regulate and control the work of health professionals. In Queensland, registered nurses, enrolled nurses and midwives are regulated by the Queensland Nursing Council, the statutory body created by the Nursing Act 1992 (Qld). Part of the regulatory role of this and other authorities is to discipline professionals whose conduct or behaviour falls short of appropriate and acceptable standards of practice. All regulated health professionals, including nurses and midwives, are potentially subject to professional disciplinary action if a complaint is lodged in relation to their conduct. This being an important issue in the management and delivery of health care, and an increased trend among health care consumers, the dearth of existing research into the disciplinary process is a major concern. This exploratory study examined the disciplinary role of the Queensland Nursing Council in adhering to its legislative mandate to ensure safe and competent nursing practice. The study focused on the extent to which structural (legislation and policy), professional, and process factors impacted on the outcomes of disciplinary Tribunals and Committees in cases of incompetent or unsafe practice and sexual misconduct. The study was situated within the interpretive paradigm using a case study approach. Specifically, it investigated cases of sexual misconduct by nurses and unsafe or incompetent practice by midwives. The study was guided by Donabedian's conceptual framework of structure-process-outcome. This framework was seen to be most suited to the aims of the study and provided a template for in-depth analysis of the data emerging from the two cases. The findings of this study provided insight into the factors underpinning the decisions of the disciplinary bodies in making determinations and formulating outcomes. There was found to be a lack of consistency and predictability in both the legislative frameworks and the interpretation of terms and concepts used to identify conduct warranting a disciplinary response from regulatory authorities. Although the processes of disciplinary proceedings are prescribed by both legislation and policy, their practical application was characterised by considerable challenges, which resulted in varying outcomes. The thesis reports this information so that it can be used as an initial basis to build a body of knowledge from practical experience with disciplinary proceedings that will inform future processes. Subsequent case studies in other contexts and systems will increase the level of knowledge available to nurses, other health care providers, health care institutions and regulatory authorities. The initial base of evidence suggests implications for practice, education and further research which are outlined in the final chapter of the thesis.