| Categorization according to dual theory | Legal regime | Example |
| Economic Activity | Private Law (contractual autonomy, equality, supervision by the police power) | All activities not considered as “public service” |
| Public service | Public Law (privileges and burdens, exorbitant powers/puissance publique, supremacy of the public interest) | Airports, ports, highways, power generation, transmission, and distribution, sanitation, gas distribution, telecommunications |