The Juries Act 1974 states that only those between the ages of 18 and 70 may be summoned to carry out jury service in England and Wales. This age range was last amended by the Criminal Justice Act 1988, which raised the upper limit from 65 to 70.he Juries Act 1974 states that only those between the ages of 18 and 70 may be summoned to carry out jury service in England and Wales. This age range was last amended by the Criminal Justice Act 1988, which raised the upper limit from 65 to 70.