All declarations (FDES and PEP) are vintage and valid for 5 years. The decision to update a declaration is the responsibility of its issuer. Like for drawing up an FDES, its updating is therefore a voluntary process. The main reasons for updating an FDES are:
- modification of the reference baseline to establish the FDES (revision of standards),
- addition of a production site or a manufacturer in the field of an FDES,
- significant change in one of the stages of the life cycle (supply of raw materials, manufacturing process, maintenance rules, modified end of life, etc.)
- update of the generic databases used to draw up the FDES.