This means that the energy committee could discuss Van der Straeten's bill as soon as March 12, the spokesperson added.
In December, Engie ENGIE.PA reached a deal on extending the operational life of the Doel 4 and Tihange 3 nuclear reactors.
Van der Straeten has said she hoped to complete the legislative process before the country's elections in June.
Tihange is a 1,038 megawatt (MW) reactor in eastern Belgium, while Doel is a 1,039 MW reactor near the port city of Antwerp. The reactors, which entered service in 1985, account for 35% of the country's nuclear energy capacity.