Thousands have gathered at Nipa station, Southern Highlands, to witness the nominations of Nipa Kutubu MP Jeffrey Komal and SHP Governor William Powi.
Komal and Powi are contesting under the People's National Congress (PNC) party.
Party leader and Prime Minister Peter O'Neill will be endorsing them.
PNC currently has 55 MPs in the coalition and will be doing its best to return its candidates.