1. Providers of online intermediation services shall set out in their terms and conditions the main parameters determining ranking and the reasons for the relative importance of those main parameters as opposed to other parameters.

2. Providers of online search engines shall set out the main parameters, which individually or collectively are most significant in determining ranking and the relative importance of those main parameters, by providing an easily and publicly available description, drafted in plain and intelligible language, on the online search engines of those providers. They shall keep that description up to date.

3. Where the main parameters include the possibility to influence ranking against any direct or indirect remuneration paid by business users or corporate website users to the respective provider, that provider shall also set out a description of those possibilities and of the effects of such remuneration on ranking in accordance with the requirements set out in paragraphs 1 and 2.

4. Where a provider of an online search engine has altered the ranking order in a specific case or delisted a particular website following a third party notification, the provider shall offer the possibility for the corporate website user to inspect the contents of the notification.