The rights given by the Working Time Regulations 1998 (WTR 1998), SI 1998/1833 apply to most workers. For further guidance generally on eligibility for rights under WTR 1998, SI 1998/1833 generally, see Practice Note: Eligibility for working time rights. Maximum working week WTR 1998, SI 1998/1833, reg 4 provides that, unless the workers has validly opted out under WTR 1998, SI 1998/1833, reg 5, a worker's working time, including overtime, in any reference period which is applicable in his case shall not exceed an average of 48 hours for each seven days. For further guidance, see Practice Note: Hours of work and working time. Special case exemptions Certain job sectors are excluded or partially excluded from the ambit of WTR 1998 and there are other situations where certain provisions of WTR 1998 are excluded. You may wish to consider whether