1. INFORMATION ON TENDERING  1.1. Participation  1.2. Contractual conditions 1.3. Compliance with applicable law  1.4. Joint tenders $^{1}$ See http://www.wto.org/english/tratop_E/gproc_e/gp_gpa_e.htm  $^{2}$ Directive 2014/24/EU of the European Parliament and of the Council of 26 February 2014 on public procurement  and repealing Directive 2004/18/EC (OJ L 94, 28.3.2014, p. 65).  3  Participation in this procurement procedure is open on equal terms to all natural and legal persons  coming within the scope of the Treaties, as well as to international organisations. It is also open  to all natural and legal persons established in a third country which has a special agreement with  the Union in the field of public procurement on the conditions laid down in that agreement.  Where the multilateral Agreement on Government Procurement 1 concluded within the World  Trade Organisation applies, the participation to this procedure is also open to all natural and legal  persons established in the countries that have ratified this Agreement, on the conditions it lays  down.  The tenderer should bear in mind the provisions of the draft contract which specifies the rights  and obligations of the contractor, particularly those on payments, performance of the contract,  confidentiality, and checks and audits. The tender must comply with applicable environmental, social and labour law obligations  established by Union law, national legislation, collective agreements or the international  environmental, social and labour conventions listed in Annex X to Directive 2014/24/EU$^{2}$. A joint tender is a situation where a tender is submitted by a group of economic operators (natural  or legal persons). Joint tenders may include subcontractors in addition to the members of the  group. In case of joint tender, all members of the group assume joint and several liability towards the  Contracting Authority for the performance of the contract as a whole, i.e. both financial and  operational liability. Nevertheless, tenderers must designate one of the economic operators as a  single point of contact (the leader) for the Contracting Authority for administrative and financial  aspects as well as operational management of the contract.  After the award, the Contracting Authority will sign the contract either with all members of the  group, or with the leader on behalf of all members of the group, authorised by the other members  via powers of attorney.