Winston Peters made the announcement on Sunday afternoon. (File photo)

New Zealand First will campaign on establishing a Special Economic Zone at Marsden Point to "provide relief" from planning regulations and the RMA in the area.

Tax and investment incentives and reduced company taxes would also be considered by the party for the zone, as part of a wider strategy to produce more goods and services for export.

Winston Peters made the announcement as part of a speech in Whangārei on Sunday afternoon, in which former Labour MP and former Far North deputy mayor Dover Samuels was in attendance.

Peters was introduced by New Zealand First MP Jenny Marcroft as a leader who had "put the steel in the backbone of this government."