The first three followed a one-year trial, while the 2006 Western Australian Daylight Saving Bill (No. 2) 2006 instituted a daylight-saving trial that began on 3 December 2006 and lasted for three years.
Tiga pertama mengikuti percobaan satu tahun, sementara Western Australian Daylight Saving Bill (No. 2) 2006 menetapkan awal percobaan waktu musim panas pada 3 Desember 2006 dan berjalan selama tiga tahun.