Case C-415/12: Order of the Court (Ninth Chamber) of 13 June 2013 (request for a preliminary ruling from the Arbeitsgericht Nienburg — Germany) — Bianca Brandes v Land Niedersachsen (Social policy — Directive 2003/88/EC — Entitlement to paid annual leave — Framework agreement on part-time work — Full-time worker having been unable to exercise her entitlement to paid annual leave during the reference period — Move of that worker to a scheme of part-time work — National provision or practice providing for a reduction in the number of days of paid leave previously accumulated thereby to be in proportion to the number of days of part-time work per week)