<P> Regulation 7 requires that an employer prevent exposure to hazardous substances or, if this is not reasonably practicable, that he adequately controls exposure . One of the main points of the COSHH risk assessment is to identify the measures that are to be used to avoid a hazard or reduce the level of risk associated with a hazard . Employers must ensure that exposure to hazardous substances is prevented or, if this is not reasonably practicable, adequately controlled . Ideally, this will mean preventing exposure by: </P> <Ul> <Li> removing hazardous substance, by changing the process; </Li> <Li> substituting it with a safe or safer substance, or using it in a safer form . </Li> </Ul> <Li> removing hazardous substance, by changing the process; </Li> <Li> substituting it with a safe or safer substance, or using it in a safer form . </Li>

When does coshh assessment not need to be reviewed