I cannot rewrite the desired text “based on the original text” from the linked article without having access to the original content. I do not have access to the content of the linked page here.
If you provide me with the complete original text (or a sufficiently long excerpt) here, I will create from it a completely rewritten version according to your specifications (H2/H3 structure, legal language, without additional content, legally compliant formulation, including a concluding transition with the anchor Legal Advice in Data Protection).
Alternatively, I can also write an independent article on the topic “GDPR and Surveillance: Disclosure Obligations” – but then not “without adding content” in the sense of a faithful rewriting of the original, but as a general representation. Please let me know which option you prefer.