EUOSHA/2021/OP/F/SE/0142  The contractor shall meet all general requirements of the technical standards and regulations for the  equipment provided, as well as the security and health regulations for public events.  If indicated in the request for services:  Based on the request for services, and depending on the location, type, specific features and  estimated value of the event, the contractor’s financial bid concerning the cost of supplies and services  from third-party suppliers must be the most advantageous solution in economic and qualitative terms  for EU-OSHA.  The contractor must establish the financial bid on the basis of at least three estimates from various  third-party suppliers, for each of the goods and services in question, except for events with an estimated  value of less than EUR 15,000, for which a single offer may be sufficient, if not requested otherwise by  EU-OSHA.  Where the contractor is unable to provide three offers from third-party suppliers for requested goods or  services, it must indicate the reasons for this to EU-OSHA.  Following the request for services, the costs from third-party suppliers must be specified and detailed  in the specific financial offer, separately from the contractor’s fee.  On the request of EU-OSHA, offers from third-party suppliers must be annexed to the contractor’s  specific offer. All the costs from third-party suppliers must be based on market prices for the goods and  services concerned. Reductions or any discounts from third-party suppliers must benefit only EU-OSHA  and by no means the contractor. The contractor cannot benefit from any additional commercial margin  other than its fees.  The invoice must be drafted to include, on the one hand, the fees and management costs of the  contractor and, on the other hand, the cost of supplies and services for the event. The contractor’s  invoice must be accompanied by a copy of detailed invoices and/or any other supporting documents  (e.g. invoices for room rental, interpreters, catering) from third-party suppliers.  33  2.3.11 Third-party suppliers  • Full evaluation and summary of the results shall be made available 2 weeks after the event.  • This evaluation based on an anonymous questionnaire could be done in paper form at the  end of the event, using an online form (online questionnaire) after the event or by means of  another suitable method depending on the event and after approval by EU-OSHA.  • The questionnaire will be provided by EU-OSHA.  • The contractor shall be responsible for the management of participants’ evaluation of the  event. Subject to evaluation shall be the organisation of the event (e.g. venue, technical  facilities, registration, prior information, programme), the information materials, the presentations of the speakers (both content and oral presentation) and the need for follow-up  activities; there should also be an overall evaluation of the event.  2.3.10 Post-event assessment 