1. The gatekeeper shall comply with all obligations set out in this Article with respect to each of its core platform services listed in the designation decision pursuant to Article 3(9).

2. The gatekeeper shall not do any of the following:

(a) process, for the purpose of providing online advertising services, personal data of end users using services of third parties that make use of core platform services of the gatekeeper;

(b) combine personal data from the relevant core platform service with personal data from any further core platform services or from any other services provided by the gatekeeper or with personal data from third-party services;

(c) cross-use personal data from the relevant core platform service in other services provided separately by the gatekeeper, including other core platform services, and vice versa; and