Contract number: ECHA/2020/666  http://ec.europa.eu/dgs/informatics/supplier_portal/doc/um_supplier_portal_overview.p df In the event of a joint tender submitted by a group of economic operators and where the  group does not have legal personality or legal capacity, one member of the group is  appointed as leader of the group. Each provision of this FWC is severable and distinct from the others. If a provision is or  becomes illegal, invalid or unenforceable to any extent, it must be severed from the  remainder of the FWC. This does not affect the legality, validity or enforceability of any  other provisions of the FWC, which continue in full force and effect. The illegal, invalid or  unenforceable provision must be replaced by a legal, valid and enforceable substitute  provision which corresponds as closely as possible with the actual intent of the parties  under the illegal, invalid or unenforceable provision. The replacement of such a provision  must be made in accordance with Article II.11. The FWC must be interpreted as if it had  contained the substitute provision as from its entry into force.  $^{1}$  OJ L 94 of 28.03.2014, p. 65  23  (a) they may not accept any direct instructions from the contracting authority; and  II.4.7  The contractor is responsible for the  personnel who carry out the services and  exercises its authority over its  personnel  without interference by the contracting  authority. The contractor must inform its   that:  II.4.6  The contractor must not present itself as a representative of the contracting  authority and must inform third parties that it is not part of the European public  service.  II.4.5  All periods specified in the FWC are calculated in calendar days, unless otherwise  specified. II.4.4  The contractor must obtain any permit or licence required in the State where the  services are to be provided.  II.4.3  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 1 .  II.4.2  The contractor must provide services of high quality standards, in accordance with  the state of the art in the industry and the provisions of this FWC, in particular the  tender specifications and the terms of its tender. II.4.1   Signature of the FWC does not guarantee any actual purchase. The contracting  authority is bound only by specific contracts implementing the FWC.  II.4. PROVISION OF SERVICES  II.3. SEVERABILITY  II.2. ROLES AND RESPONSIBILITIES IN THE EVENT OF A JOINT TENDER 