The four electorates that are set to go into by-elections are Sohe Open, Madang Open, Maprik Open and the new Porgera Paiela Open in Enga province.
The issue of writs for these by-elections is scheduled for the 29th of February and nominations are to close on the 6th of March.
The campaign period will be for eight weeks. It starts on the 29th of February and ends on the 26th of April.
Polling commences on the 27th of April and ends on the 10th of May.