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- Published
- Updated
- Sources checked
A change log becomes useful when it explains why a proposed amendment follows a particular regulatory route.
CTIS substantial modifications — Define the regulatory scope
CTR defines substantial modification by its likely impact on participant safety or rights, or data reliability and robustness. The label used by a project team is not decisive.
CTIS substantial modifications — Build the working record
Prepare a before-and-after table covering procedures, population, product information and statistical assumptions. Assess Part I and Part II effects separately and identify any linked changes already under assessment.
CTIS substantial modifications — Check before release
- Describe the actual change rather than its filename.
- Document participant and data consequences.
- Confirm implementation conditions country by country.
CTIS substantial modifications — Record the decision and handover
Approve a dated classification rationale with regulatory and medical input. Schedule implementation against the required authorisation and communication steps; urgent safety action needs its own applicable process.
Frequently asked questions
- Is every protocol typo a substantial modification?
- No. Assess the effect of the actual change, not merely the document type.
- Can the CRO decide without sponsor involvement?
- Delegated preparation is possible, but sponsor oversight and decision accountability must remain explicit.