night time — any period of not less than seven hours, as defined by national law, and which must include in any case the period between midnight and 5 a. m 3.

night worker — on the one hand, any worker, who, during night time, works at least three hours of his daily working time as a normal course; and on the other hand, any worker who is likely during night time to work a certain proportion of his annual working time, as defined at the choice of the Member State concerned: by national legislation, following consultation with the two sides of industry; or by collective agreements or agreements concluded between the two sides of industry at national or regional level 4.

rest period — any period which is not working time 2.

shift work — any method of organizing work in shifts whereby workers succeed each other at the same work stations according to a certain pattern, including a rotating pattern, and which may be continuous or discontinuous, entailing the need for workers to work at different times over a given period of days or weeks 5.

shift worker — any worker whose work schedule is part of shift work. SECTION II MINIMUM REST PERIODS - OTHER ASPECTS OF THE ORGANIZATION OF WORKING TIME 6.

working time — any period during which the worker is working, at the employer's disposal and carrying out his activity or duties, in accordance with national laws and/or practice 1.