Cautions (including reprimands and warnings) are covered by the Rehabilitation of Offenders Act 1974 so will become spent immediately (apart from conditional cautions which will become spent after 3 months). This means that if you are asked on an application form if you have a caution you can reply 'no'. For conditional cautions it would be after 3 months since the caution was issued, up until that time you would have to reply 'yes'.This applies retrospectively so applies to anyone who has ever had a caution (including reprimands and warnings), regardless of when it was given. If the application form says that the post is exempt from the Rehabilitation of Offenders Act 1974 then the caution must be disclosed, no matter how long ago it was given.However, this does not mean that it will not be disclosed on a CRB check. Under the current system all cautions, reprimands and final warnings are disclosed on both Standard and Enhanced CRB disclosures no matter how far back they go. If a caution / reprimand / warning is on record then it will be disclosed.Cautions will always remain on a person's record.