Once an individual has been suspended for not having a valid disclosure, in order to be unsuspended they will need to obtain a disclosure and complete the vetting process. The suspension will only come to an end once they have received formal notification in writing from the relevant Commissioner (in most cases the District Commissioner).
Guidance on how to obtain a disclosure in England and Wales can be found here. Guidance for people in Scotland can be found here, and for Northern Ireland here. For volunteers in BSO please click here.