The FIA has formally launched a process for searching for an alternative engine supplier from the start of the 2017 season.
The FIA, along with Bernie Ecclestone, revealed last month that they were eager to introduce a cheaper alternative to the current power units.
"The FIA has decided to launch a consultation among the engine manufacturers in order to potentially identify for the 2017, 2018 and 2019 seasons of the aforementioned championship an exclusive alternative engine manufacturer which will be solely entitled to supply this alternative engine to the competitors entered for said seasons of the championship," read an FIA statement.
"The FIA is now calling for expressions of interest to identify candidates interested in becoming the exclusive supplier of the alternative engine to the competitors. This call for expressions of interest is governed by French law."
The deadline for applicants to lodge their expression of interest is Monday 23 November.