Article 36 of Law 3905/2010 does not specify whether the applicant must be informed of the final decision and, if applicable, the reasons for denial. Article 36 does not itself specify any national licensing requirements, but notes that other local or sub-national authorities may impose licensing requirements. These include permission to film near military installations and national monuments.  Further examples of such requirements are provided by the Hellenic Film Commission: https://filmcommission.gr/permits-guidelines/