LONDON – Long-awaited guidance on how software will be treated under the stricter EU devices regulations brings clarity but also adds to the mountain of preparations needed to comply with the new rules. The vast majority of software products that are treated as class I under the current rules – and therefore self-certified – will be upgraded to class IIa and higher under the Medical Devices Regulation (MDR) coming into effect in May 2020, and the In Vitro Diagnostic Regulation (IVDR), which takes effect May 2022.