Since its publication in 2001 the International Classification of Functioning, Disability and Health (ICF) has attracted debate about the content and the model presented. After almost 20 years use, regular updating since 2008 and with the prospect of a new edition in 2020 there is increasing interest in the ICF as a tool to meet contemporary information requirements. Information on functioning is important across not only health systems, but all areas where change in functioning is important: education, employment, and social welfare for example. This commentary responds to the issues raised in a commentary by Mitra & Shakespeare in 2019 and supports review of the ICF in the current context by informing users and providers of data on human functioning how they might engage in the maintenance, updating, and modernisation of the ICF.