In addition to the pre-employment declaration provided for in Article L. 1221-10, a pre-employment declaration must be made :
1° When an establishment, having ceased to employ staff for at least six months, proposes to employ staff again;
2° When an establishment employing staff changes operator;
3° When an establishment employing staff is transferred to another location or if it undergoes an extension or transformation resulting in a change in its industrial or commercial activities.