4. FORM AND CONTENT OF THE SUBMISSIONS  4.1. Form of the tender: how to submit the request to participate/tender?  4.2. Content of the submission under step 1: what documents to submit with the  request to participate?  Requests to participate/tenders are to be submitted according to the instructions laid down in  the Invitation to submit request to participate /Invitation to tender letter.   A request to participate/tender received after the deadline indicated in the respective  Invitation letter will be rejected. The documents to be submitted with the request to participate are listed in  Annex 1. The following requirements apply:  The letter must clearly indicate:  The form must be duly signed by an authorised representative of the legal entity. It is  available at the following link:  http://ec.europa.eu/budget/contracts_grants/info_contracts/legal_entities/legal_entities_en.cfm  Entities that are already registered in the  Contracting authority’s  accounting system (i.e. they  have already been contractors of the Commission) must provide the form but are not obliged  to provide the supporting documents.  The form must be duly signed by an authorised representative of the candidate (the  Group  leader  in case of a joint tender). It is available at the following link:  o the procedure reference number and title,  o the name of the candidate (in case of a  joint tender  the names of all members  of the group and the name of the  Group leader ).  o if applicable, the names of identified subcontractors and entities on whose  capacity the candidate relies for fulfilling the selection criteria,  o contact details for communications with the  Contracting authority  (including  contact person and email),  o indication whether the candidate is a Small or Medium Size Enterprise in  accordance with Commission Recommendation 2003/361/EC (this information  is used for statistical purposes only).   Identification forms and supporting documents  o Legal Entity Form (and supporting documents indicated in the form) o Financial Identification Form (and supporting documents indicated in the form) TEMPLATE: Restricted procedure - Tender specifications Part 1 Administrative Specifications  JRC R.9 - IMS-JRC-S3.1-TMP-0048 - v.1.0 17/02/2020 M(EN)  Page 17 of 32   Cover letter  signed by an authorised representative of the candidate.