Opposition lawmakers from the left and right launched a long process that could ultimately lead to a popular referendum under a procedure introduced in 2008. The Constitutional Council will examine their request.
The state owns 50.6% of ADP and did not specify how much it would sell. The centrist government says the move would raise 10 billion euros ($11.3 billion), money that would help finance investment in new technologies.
Opponents say Paris airports are strategic hubs.