Employees in a “heavy occupation” can retire earlier than other employees. As the National Government is planning to make different changes to the pension legislation, a National Pension Committee was established. One of the tasks of this Pension Committee was to adapt the notion “heavy occupations” in the pension legislation. At the moment, the notion “heavy occupation” refers to work in successive shifts, uninterrupted services of 11 hours, and night work. The National Pension Committee has agreed to split up the notion “heavy occupations” into 4 categories (stressful working conditions, stressful work organization, increased security risks and mentally or emotionally heavy tasks). However, for each category, specific criteria are to be defined by the social partners to determine whether or not a job falls under one of these categories.