The quantification of risk is fundamental to assessing its acceptability. When drafting codes of practice, the quantified risk is used in assessing the reliability of the structure and ensuring this complies with national norms. Problems arise in complex situations where rational determination of risk is difficult. An example is the development of dolomitic land where sinkholes or other forms of subsidence can result in severe damage to the built environment and loss of life. This paper describes the approach currently being adopted in South Africa for the drafting of national standards for the development of dolomitic land and the regulatory processes involved. It also looks at the steps taken to ensure that the standards are not unduly prescriptive.