Contracts are awarded, depending on their value, their purpose or the circumstances in which they are concluded:
1° Either in accordance with a formalised procedure;
2° Or in accordance with an adapted procedure;
3° Or without prior advertising or competitive tendering.
The estimated value of the requirement is calculated in accordance with the conditions set out in articles R. 2121-1, R. 2121-3, R. 2121-4, R. 2121-5, R. 2121-6 and R. 2121-7 of the French Public Procurement Code.