1 3. The Authority may issue a reasoned measure ordering the provisional suspension of unfair commercial practices whenever there is a particularly urgent need. At all events, it shall serve notice of the commencement of proceedings on the trader concerned, and if the principal is unknown the Authority may request the owner of the medium advertising the unfair practice to supply the information needed to identify the principal. The Authority may also request businesses, organisations or private individuals in possession of information and documents to supply them if they are of relevance for the purposes of identifying infringements. The provisions of section 14 (2), (3) and (4) of Law No 287 of 10 October 1990 shall be applied.