Article 3 4

(a)

is subject to a legal or regulatory obligation which requires it to change its terms and conditions in a manner which does not allow it to respect the notice period referred to in the second subparagraph of paragraph 2;

(b)

has exceptionally to change its terms and conditions to address an unforeseen and imminent danger related to defending the online intermediation services, consumers or business users from fraud, malware, spam, data breaches or other cybersecurity risks.