2.
Without prejudice to the protection of undertakings’ trade secrets as defined in Article 2, point (1), of Directive (EU) 2016/943, providers of proprietary audience measurement systems shall provide, without undue delay and free of charge, to media service providers, to advertisers and to third parties authorised by media service providers and advertisers accurate, detailed, comprehensive, intelligible and up-to-date information on the methodology used by their audience measurement systems. Providers of proprietary audience measurement systems shall ensure that the methodology used by their audience measurement systems and the way in which it is applied is independently audited once a year. At the request of a media service provider, a provider of a proprietary audience measurement system shall provide it with information on audience measurement results, including non-aggregated data, which relate to the media content and media services of that media service provider. This paragraph shall not affect the Union’s data protection and privacy rules.