(1) In this Act -

"agreement" means a collective agreement, an employment regulation order or a registered employment agreement;

"break" means the interval during which a child or young person may not be permitted under this Act to work;

"child" means a person who has not reached the age of 16 years;

"collective agreement" means an agreement by or on behalf of an employer on the one hand, and by or on behalf of a trade union or trade unions representative of the employees to whom the agreement relates on the other hand;