Case C-288/14: Judgment of the Court (Second Chamber) of 30 June 2016 (request for a preliminary ruling from the Tribunalul Timiș — Romania) — Silvia Ciup v Administrația Județeană a Finanțelor Publice (AJFP) Timiș — Direcția Generală Regională a Finanțelor Publice (DGRFP) Timișoara (Reference for a preliminary ruling — Principle of sincere cooperation — Principles of equivalence and effectiveness — National legislation laying down the detailed rules for the repayment, with interest, of taxes improperly levied — Enforcement of judicial decisions relating to such rights to repayment stemming from the legal order of the European Union — Repayment by instalments spread over five years — Repayment contingent on the existence of funds received from a tax — No possibility of enforcement)