Purchasers, with the exception of the central public authorities listed in a notice annexed to this Code, may use a notice referred to in Article R. 2131-1 to issue an invitation to tender as part of a restricted tender procedure or a procedure with negotiation.
In this case, this notice must meet the following conditions:
1° Make specific reference to the works, supplies or services that will be the subject of the contract to be awarded;
2° State that this contract will be awarded in accordance with a restricted invitation to tender or a procedure with negotiation without subsequent publication of an invitation to tender and invite interested economic operators to express their interest;
3° Have been sent for publication between thirty-five days and twelve months before the date on which the invitation to confirm interest is sent.