Any decision taken pursuant to this Directive concerning the assessment of conformity or suitability for use of interoperability constituents or the checking of subsystems constituting the Union rail system or any decision taken pursuant to Articles 7, 12 and 17 shall set out in detail the reasons on which it is based. It shall be notified as soon as possible to the party concerned, together with an indication of the remedies available under the law in force in the Member State concerned and of the time limits allowed for the exercise of such remedies.