  As consensus across the various published AI ethics principles is approached,
a gap remains between high-level principles and practical techniques that can
be readily adopted to design and develop responsible AI systems. We examine the
practices and experiences of researchers and engineers from Australia's
national scientific research agency (CSIRO), who are involved in designing and
developing AI systems for many application areas. Semi-structured interviews
were used to examine how the practices of the participants relate to and align
with a set of high-level AI ethics principles proposed by the Australian
Government. The principles comprise: (1) privacy protection and security, (2)
reliability and safety, (3) transparency and explainability, (4) fairness, (5)
contestability, (6) accountability, (7) human-centred values, (8) human, social
and environmental wellbeing. Discussions on the gained insights from the
interviews include various tensions and trade-offs between the principles, and
provide suggestions for implementing each high-level principle. We also present
suggestions aiming to enhance associated support mechanisms.
