Step 1: Find the legislation's Core Document Homepage.
Step 2: Use the View the History of Amendments to this Title table (past and upcoming amendments) or the Check for Amendments since the last Consolidation table (amendments not yet proclaimed/in force).
Note the Legend at the top of the table:
Go to the part, section or schedule you are looking at, e.g. the s 4(1) definition of "heritage place" in the Aboriginal Heritage Act 2016 (Vic):
The table tells you that:
The s 4(1) definition of "heritage place" was inserted into the Aboriginal Heritage Act 2006 (Vic) by the amending legislation, Act No 11 of 2016. Section 5(1) of Act 11 of 2016 made the amendment, which commenced on 1 August 2016.
To fid the name of the amending Act, hover your cursor over the table entry:
Click on 2016/11 to go to the Core Document Homepage for the Aboriginal Heritage Amendment Act 2016 (Vic). Check the accuracy of the table by going to s 5(1) of the amending Act:
Acts making amendments to the Aboriginal Heritage Act 2006 (Vic) which are in force are listed at the end of the History of Amendments table:
This table has the same Legend as the View the History of Amendments to this Title table, and is read in the same way.
Acts containing provisions not yet in force are included.
Bills which will amend legislation at a future date are included, as in this example for the Crimes Act 1958 (Vic) (information correct as of 19 September 2019):
The table states that:
The s 2A(1) definition of "animal enterprise" in the Crimes Act 1958 (Vic) will be inserted by 's 3' of B19/42.
Find the title of B19/42 by hovering your cursor over it:
To see the text of the definition of "animal enterprise" which will be inserted into s 2A(1) of the Crimes Act 1958 (Vic) at a future date*, click on the link and at the Bill's Core Document Homepage, then
Go to cl 3 and find the new definition:
* Commencement - Crimes Amendment (Trespass) Bill 2019 (Vic)
This is an "unknown", but you can track Assent dates.