What does the EUCJ ruling mean?

The European Court of Justice (ECJ) ruled that EU member states must require employers to
set up a system that tracks time worked each day by each employee to ensure labor laws are
complied with. Member States must require employers to set up an objective, reliable and
accessible system enabling the duration of time worked each day by each worker to be
measured. The court said the implementation of such systems, and particularly what form
they must take, is up to the member states.