Contract number: ECHA/2020/666  The FWC is implemented via  reopening of competition as follows: the contracting  authority orders services by sending a  request for offer by electronic means to all  contractors. The request of offer shall indicate the elements defined for each type of specific contract  in Annex I (Section 6 of the “Technical Specifications”). The specific contract may precise  the terms of the Framework Contract or modify them insubstantially.  The contractors are requested to inform the contracting authority within 5 [five] working  days from the request for offer whether they consider submitting an offer in the reopening  competition.  The contractors shall deliver their offers to the contracting authority within the time limit  indicated in the  request for offer,  by electronic means. The technical offer must meet the  requirements of the request for services and the financial offer must be based on the unit  prices agreed in the FWC or on lower prices.  The contracting authority shall evaluate the offers and select the most economically  advantageous one on the basis of the award criteria set out in Annex I (section 3.7 of the  Tender Specifications) When doing so, the contracting authority shall take into account any  conflicting interests, which may negatively affect the  performance of the specific contract ,  as provided for in Article II.7. The contracting authority will award and send the specific  contract to the successful contractor for its signature in paper format and/or by electronic  means.  The contractor must send back to the contracting authority the specific contract duly signed  and dated in paper format and/or by electronic means within 2 [two] working days of  receipt. If the contractor repeatedly refuses to sign the specific contracts or repeatedly fails to send  them back on time, the contractor may be considered in breach of its obligations under  this FWC as set out in Article II.18.1 (c).  [Lot 2]  The FWC shall be implemented through specific contracts, either on a fixed price,  quoted time and means or a time and means basis, as described in Annex I.  The FWC is implemented  in cascade  as follows: the contracting authority orders services  by sending a  request for offer , by electronic means ,  to the contractor who is ranked first  in the cascade. The request shall indicate the elements defined for each type of specific  contract in Annex I (section 6 of the “Technical Specifications”).  Within a maximum of 5 [five] working days of a  request for offer being sent by the  contracting authority to the contractor, the contracting authority shall receive by electronic  means the completed offer back, duly signed and dated.  The contracting authority orders services by sending the contractor a specific contract in  paper format and/or by electronic means. The contractor must send back to the contracting  authority the specific contract duly signed and dated in paper format and/or by electronic  means within 2 [two] working days of receipt. If the contractor does not accept the order, fails to observe the deadline for submission of  the offer, or if the offer is not accepted by the contracting authority, or if the contractor is  in a situation of conflicting interests that may negatively affect the  performance of the  specific contract , as provided for in Article II.7, the contracting authority may place the  order with the next contractor on the cascade.  7 