@MayoMay I was the primary applicant under skilled immigration subclass ANZSCO 233512 (Mechanical Engineer), VISA 189. But then, since I shall be bringing all of the family members (wife and 4 children) with me, they are also in the application process inclusion - lahat sila visa 189 din. And according to the amended immigration rule sa visa payment, per head na lahat ang visa payment unlike year 2011 and below, primary applicant lang ang magbabayad ng visa fees and waived na ang other members. The more na mas may edad na visa applicant mas mahal ang visa fees.
Awaiting for visa grant na status namin right now. Lahat nag undergo ng medical process sa buong family but the NBI applies to me and my wife only. I only took the IELTS as my wife had just been required of the English MOI requested from her school/university. Sabay na marerelease ang visa ng buong family. I am still uncertain of our reflected IED (initial entry date) on our visa grant notice. But definitely, ako ang mauuna umalis pa australia. My plan is October 2016 ako pa-flight to Perth. You can refer to the NBI clearance date na you had submitted as usually doon nagrerefer ng IED si case officer assigned to you. So, in my case May 25,2016 ako nag submit ng NBI so I could assume na our IED is May 25, 2017. It all depends sa CO nyo, minsan 6 months lang ang gap dapat enter na kayo sa AU. Therefore, pwede sumunod family ko on or before that date early next year. Hope I had answered your queries objectively. Good luck and God bless!