Disclosure-based schemes are examples of ‘reflexive law’ in action. Perhaps the best-known example in environmental regulation is the US Toxics Release Inventory, which achieved unexpected reductions in emissions. Pollution Release and Transfer Registers (PRTRs) are now used across the world. Disclosure-based schemes require careful design. In order for information to be useful and usable for regulatory purposes, it must be comparable. There is therefore a need for standardisation in reporting methods and metrics. Institutional factors which frame the context for decision-making, such as the range of possible actions, the standards of proof and exclusionary rules that apply, and the oversight arrangements can influence the creation, collection and consideration of information in regulatory processes. In order to be effective, informational regulation must be sustainable, gaining in use, accuracy and scope over time.