Under the criteria of the National High Court in judgments of 12/4/2015 and 19/2/2016 it has been interpreted that the company has the obligation to establish a system of registration of the effective daily work done by the staff in any case. On 03/23/17, the Supreme Court has considered an appeal of causation with respect to the first of the aforementioned, circumscribing the requirement of Article 35.5 of the Statute of Workers to the recording of overtime. Therefore, at the moment, it would theoretically not be required to register the day except for part-time contracts, special assumptions or overtime. However, as the Supreme Court, itself says "... a legislative reform would be desirable to clarify the obligation ...".