This chapter reviews and discusses some of the key considerations including thresholds and coverage, equivalence, additionality and permanence, robust monitoring frameworks, and compliance and enforcement, as well as transaction costs. In principle, the coverage of a programme should be as broad as possible to ensure that the value of biodiversity to society is generally reflected in development decisions. Development projects are only covered by an offsets programme when the level of project-related biodiversity loss exceeds a certain significance threshold, but coverage is sometimes restricted to only certain economic sectors (Table 4.1).