II.4. DELIVERY OF SUPPLIES / PROVISION OF SERVICES  II.4.1. Delivery of supplies  II.4.1.1 Signature of the FWC does not guarantee any actual purchase. The contracting authorityis bound  only by specific contracts implementing the FWC.  II.4.1.2 The contractor must comply with the minimum requirements provided for in the tender specifications.  This includes compliance with applicable obligations under environmental, social and labour law  established by Union law, national law and collective agreements or by the international  environmental, social and labour law provisions listed in Annex X to Directive 2014/24/EU$^{2}$ as well as  compliance with data protection obligations resulting from Regulation (EU) 2016/679 3 and  Regulation (EU) 2018/1725.  II.4.1.3 All periods specified in the FWC are calculated in calendar days, unless otherwise specified. II.4.1.4 The contractor must not present itself as a representative of the contracting authorityand must inform  third parties that it is not part of the European public service.  II.4.1.5 The contractor is responsible for the personnel who perform the contract and exercises its authority  over its personnel without interference by the contracting authority. The contractor must inform its  personnel that:  (a) they may not accept any direct instructions from the contracting authority; and  (b) their participation in providing the supplies does not result in any employment or contractual  relationship with the contracting authority.  II.4.1.6 The contractor must ensure that the personnel implementing the FWC and any future replacement  personnel possess the professional qualifications and experience required to provide the supplies,  as the case may be on the basis of the selection criteria set out in the tender specifications.  II.4.1.7 At the contracting authority’s reasoned request, the contractor must replace any member of  personnel who:  (a) does not have the expertise required to provide the supplies; or  (b) has caused disruption at the premises of the contracting authority.  The contractor bears the cost of replacing its personnel and is responsible for any delay in providing  the supplies resulting from the replacement of personnel.  II.4.1.8 The contractor must record and report to the contracting authority any problem that affects its ability  to deliver the supplies. The report must describe the problem, state when it started and what action  the contractor is taking to resolve it.  II.4.1.9 Delivery  (a) Time allowed for delivery  (b) Date, time and place of delivery  The time allowed for delivery is calculated in accordance with Article I.4.  2 OJ L 94 of 28.03.2014, p. 65.  3 Regulation (EU) 2016/679 of the European Parliament and of the Council of 27 April 2016 on the protection of natural persons  with regard to the processing of personal data and on the free movement of such data, and repealing Directive 95/46/EC, OJ L  119, 4.5.2016, p. 1.  14 