Abstract: The authors report on a recent study investigating the statutory role of responsible clinician. Statutory roles under mental health legislation offer mental health nurses a means of having advanced practice skills recognised, as well as contributing to improved access to services. There is a proliferation of roles intended to develop nursing readership, but in most cases they are not primarily clinical roles. The concept of “advanced practice” has become a means of developing clinical leadership roles in nursing. Research on responsible clinician role is presented along with the results of a survey of the 11 Registered Nurses practicing as responsible clinicians, five senior nurses from each of the 21 district health boards, and the Auckland Regional Forensic Psychiatry Services (n = 121). Respondents were asked whether the responsible clinician role was a legitimate one for nurses and whether they were motivated to attain or maintain that role. They were also asked which competencies for the role they believed they met, their perceptions of credentialing processes and the educational requirements needed to achieve the role. A clear majority of the respondents felt the role of the responsible clinician was a legitimate advanced practice role for mental health nurses. Despite this, some respondents expressed ambivalence about taking on the role. The research highlighted deficits in knowledge and skills that could become a focus of education for advanced practitioners seeking appointment as responsible clinicians. Deficits included some assessment skills, knowledge of a range of interventions and knowledge of other legislation affecting mental health legislation.