The Registered Dealers in Controlled Oil (RDCO) scheme was introduced in 2002, with an exemption for businesses supplying and receiving oil in pre-packaged containers not exceeding 20 litres. All other supplies of controlled oils were included in the RDCO scheme. The scope of this exemption was reviewed in a post-implementation review of the scheme in 2005, and the decision was taken not to extend it. We continue to review the scheme in order to minimise the administrative burdens on businesses.