Reviewing the impact to the IT environment is the most important task for a risk practitioner to perform after the announcement of a new IT regulatory requirement, because it helps to identify and assess the gaps and risks that the new requirement may introduce or affect. A regulatory requirement is a rule or standard that an organization must comply with to meet the expectations of a regulator, such as a government agency or an industry body. A new regulatory requirement may impose new obligations, restrictions, or expectations on the organization, especially on its IT environment, which supports the business processes and functions. Therefore,reviewing the impact to the IT environment is the first step to understand the implications and implications of the new requirement, and to plan the appropriate actions to achieve compliance. Preparing an IT risk mitigation strategy, escalating to senior management, and performing a cost-benefit analysis are all important tasks to perform after reviewing the impact to the IT environment, but they are not the most important task, as they depend on the results of the impact review. References = Risk and Information Systems Control Study Manual, Chapter 4, Section 4.3.1, page 153