The contracting authority may reproduce this Documentation in full or in part for any Internal use by its staff. The contracting authority shall reproduce all references to Intellectual property rights appearing on the originals. 

## IV.2.9. Identifiers 

The contracting authority may decide to assign an identifier to a unit of a delivered Product . In such case, the contractor commits itself to using an identifier for every unit of a Hardware or Telecommunications Product delivered to the contracting authority. This identifier is communicated to the contractor by the contracting authority when the Consignment note , or, if applicable, the Certificate of Conformity for such unit has been signed. The identifier(s) shall be given in electronic file(s) in such manner as shall have been agreed by both Parties. The contractor’s original identifier mentioned in its delivery documents is associated with the contracting authority’s identifier. After that, only the contracting authority’s identifier is to be used in all instances when the contractor refers to the unit in question (for example in all operations relating to the service desk, invoicing of maintenance, technical intervention, etc.). 

