Any substantial modification at the initiative of the sponsor of a research project, clinical investigation or performance study covered by national defence confidentiality must obtain, prior to its implementation, a favourable opinion from the Defence and National Security Committee for the Protection of Individuals mentioned in I of Article L. 1123-16 and, in the case of research mentioned in 1° of article L. 1121-1, clinical investigations mentioned in II of article L. 1125-1, or performance studies mentioned in II of article L. 1126-1, authorisation from the competent authority. In this case, the Committee ensures that a new consent is obtained from the persons participating in the research, clinical investigation or performance study.