- Author assessment of available information to determine state grades and trends
- Assessments for all components are somewhat comparable to the 2011 assessments, noting:
- changes to drainage divisions:
- South-east Coast division is now considered as two divisions: South-east Coast (New South Wales) and South-east Coast (Victoria)
- Gulf of Carpentaria division was renamed as Carpentaria Coast division
- Indian Ocean division was renamed as Pilbara—Gascoyne division
- Timor Sea division was renamed as Tanami—Timor Sea Coast division
- detail on the method of assessment used in 2011 was not available for comparison.
- changes to drainage divisions:

Comments
Nil.