The decree covers the northern section of Line 14 from Mairie du Saint-Ouen to Saint-Denis Pleyel, and the section of Line 16/17 from Saint-Denis Pleyel to Le Bourget RER, Clichy-Montfermeil, and Noisy-Champs.

The granting of public utility status gives the project's developer, Société du Grand Paris, the legal powers it requires to begin land acquisition and preliminary construction as well as demolition, archaeological works, and test bores for tunnels.

Last October SGP awarded Arcadis a contract to provide project management services on the 26km section of Line 15 between Saint-Denis Pleyel and Champigny Centre. The section from Saint-Denis Pleyel to Rosny is due to open in 2025, with completion of the line to Champigny Centre scheduled for 2030.

The southern section of Line 15 became the first phase of the network to be granted public utility status in December 2014 and preliminary works are now underway. Studies are continuing on other parts of the network and public inquires will be held in the first half of this year for the northern section of Line 17 and Line 18.