Architectural firms can only be formed by architects members of the National Order of Architectes. Foreign architectes can be admitted to the Order subject to a reciprocity condition.
"Chapter 3: PRACTICE OF THE PROFESSION, RIGHTS AND DUTIES OF ARCHITECTS
Section 1: Practice of the profession
Rule 49
All architects practice their profession in one of the following ways: 1. in a private capacity as a freelancer, employee or partner of a firm of architects, legal or natural person;
[...]
Section 51
Any foreign person wishing to register with the Order must also:
- have their academic title approved;
- guarantee the conditions of reciprocity with his country of origin.
This registration is only admissible if the principle of reciprocity is acquired.
[...]
Section 54
For any project with external financing, governmental or private, partially or totally, if a foreign architect is appointed, without fulfilling the conditions set out in article 13 of this law, the latter joins, within the framework of the said project, to an architect registered on the roll of the order. [...]" (Law No. 18/034 on the creation, organization and functioning of the National Order of Architects [google translation])
Law No. 18/034 on the creation, organization and functioning of the National Order of Architects [google translation]
[<a href="https://www.droitcongolais.info/files/713.12.18-Loi-n-18_34-portant-creation-de-lordre-des-Architectes.pdf">Law</a>]