ICH E6(R3) – A documented description of a change(s) to a protocol.
CDISC-Gloss – A written description of a change(s) to or formal clarification of a protocol. NOTE: If a protocol modification is substantial, it may require notification to the regulatory authority. For example, substantial impacts on the safety or rights of the subjects or on the reliability and robustness of the data generated in the clinical trial. [ICH E3; ICH E6 (R2) Glossary 1.45]