Article 35(1) and 35(3) When a DPIA is required
The high-risk trigger for a DPIA, the three cases where one is always required, national lists of operations that need one, and the WP29 nine-criteria screening test.

GDPR Articles 35 and 36: when a data protection impact assessment is required, what it must contain and when to review it, and consulting the supervisory authority when high risk remains after mitigation.
The high-risk trigger for a DPIA, the three cases where one is always required, national lists of operations that need one, and the WP29 nine-criteria screening test.
The minimum content of a DPIA: description, necessity and proportionality, risk assessment and mitigating measures; seeking views of data subjects; publishing; and reviewing the assessment when risk changes.
Consulting the supervisory authority before processing when a DPIA shows high residual risk: what to submit, the eight-week response period and extension, and the authority's powers if processing would infringe the GDPR.

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