Ref. Ares(2021)2953911 - 04/05/2021 EUROPEAN COMMISSION  DIRECTORATE-GENERAL ENVIRONMENT  Directorate A- Policy, Coordination, LIFE Governance and Resources  ENV.A.5 - Finance Dear Madam/Sir,  The EUROPEAN COMMISSION, Directorate General Environment, referred to below as  the  contracting authority, is planning to award the contract(s) resulting from the above  procurement procedure. The procurement documents consist of the contract notice, this  invitation letter, the draft contract(s) and tender specifications with their respective annexes.  All documents are available at the following TED eTendering website$^{1}$: https://etendering.ted.europa.eu/cft/cft-display.html?cftId=8446  Economic operators interested in this contract are invited to submit a tender in one of the  official languages of the European Union. Tenders must be submitted exclusively via the electronic submission system (eSubmission)  available from the above website$^{2}$ and accessible on the Funding and Tenders Opportunities  portal (F&T portal)$^{3}$, Tenders submitted in any other way (e.g. e-mail or by letter) will be  disregarded.  In order to submit a tender using eSubmission, economic operators (each member of the  group in the case of a joint tender) will need to register in the European Commission's Participant Register - an online register of organisations participating in EU calls for tenders  or proposals. On registering each organisation obtains a Participant Identification Code (PIC,  9-digit number) which acts as its unique identifier in the above register. Instructions on how  to create a PIC can be found on this page. Economic operators already registered in the  Participant Register shall reuse their existing PICs when preparing tenders in eSubmission.  The time-limit for receipt of tenders is indicated under Heading IV.2.2 of the contract notice  where local time shall be understood as local time at the contracting authority's location (the  location indicated under Heading I.1 of the contract notice). $^{1}$ Subscription to the call for tenders at the above link allows interested economic operators to receive e-mail  notifications when new information or documents are published. Subscription is free of charge and does not  involve any commitment to submit a tender. $^{2}$ For detailed instructions on how to submit a tender please consult the eSubmission Quick Guide available at:  https://ec.europa.eu/info/funding-tenders/opportunities/docs/esubmission/quickguidepp_en.pdf.  The supported browsers, file types, size of attachments and other system requirements can be consulted at:  https://webgate.ec.europa.eu/fpfis/wikis/x/Oo5kI. In case of technical problems, please contact the eSubmission  Helpdesk (see contact details in the eSubmission Quick Guide) as soon as possible.  $^{3}$ https://ec.europa.eu/info/funding-tenders/opportunities/portal/screen/home  1  1. Submission of tenders.  Subject:  -  ENV/2021/OP/0003 -  Supporting the development of a roadmap for the  reduction of whole life carbon of buildings Brussels, Launch date 03-05-2021  Ares(2021) 