In the Main Structure special purpose codes relate to, in ascending hierarchical order: SLAs, SSDs, SDs and S/Ts.
Special purpose SLA codes
Four-digit SLA codes ending with 99 are reserved for coding undefined area data to SLA level. The first two digits of undefined SLA codes are normally in the range 00–89.
These codes are used in the following cases:
- Data required to be coded at SLA level but only able to be coded at SSD level, is coded to the undefined SLA within the defined SSD.
- Data required to be coded at SLA level but only able to be coded at SD level, is coded to the undefined SLA of the undefined SSD (see chapter 8) within the defined SD.
A number of SLA codes within the range 0099–9999 are reserved for specific applications.
- Code 0099 is reserved for the undefined SLA in each capital city SD.
| Example: | |
| S/T | SD | SSD | SLA | | |
| | |
| 1 | 05 | 88 | 0099 | Undefined Sydney | |
| | |
- Code 9899 is reserved for the undefined SLA within an undefined SD, within a defined S/T. For example, when data is required to be coded at SLA level but is only able to be coded at the S/T level, it is coded to SLA 9899.
| Example: | |
| S/T | SD | SSD | SLA | | |
| | |
| 1 | 88 | 88 | 9899 | Undefined New South Wales | |
| 8 | 88 | 88 | 9899 | Undefined Australian Capital Territory | |
| | |
| | | | | | |
- Code 9099 is reserved for the undefined SLA within an undefined SD, within an undefined S/T (see below). For example, when data is required to be coded at SLA level but is only able to be coded at the Australia level, it is coded to SLA 9099. This code is used to code Population Census data when usual residence information is not stated.
| Example: | |
| S/T | SD | SSD | SLA | | |
| | |
| 0 | 88 | 88 | 9099 | Undefined S/T, Not Stated for census purposes | |
| | |
- Code 9199 is used in ‘usual residence’ and similarly worded coding where the information is not applicable (e.g. children who had not been born five years ago).
| Example: | |
| S/T | SD | SSD | SLA | | |
| | |
| 1 | 88 | 88 | 9199 | Not Applicable, New South Wales | |
| | |
- Code 9299 is used in usual residence and similarly worded coding when the data relates to overseas.
| Example: | |
| S/T | SD | SSD | SLA | | |
| | |
| 3 | 88 | 88 | 9299 | Overseas, Queensland | |
| | |
- Code 9399 is used as a dummy LGA to enable S/T totals to be produced for some LGA output from the Censuses of Population and Housing. In such circumstances, code 9399 equates to the aggregated unincorporated SLAs in each S/T.
- Code 9499 is used for persons with no fixed place of abode, including children in care, persons in prison etc.
| Example: | |
| S/T | SD | SSD | SLA | | |
| | |
| 4 | 88 | 88 | 9499 | No fixed abode, South Australia | |
| | |
Special purpose SD and SSD codes
The two-digit code 88 is reserved for coding undefined area data to SSD and SD levels. A dummy SD, with an SD code of 88, exists for every S/T in the Main Structure, except Other Territories. Similarly there is a dummy SSD for every SD, except for Other Territories.
Special purpose S/T code
Data are coded to Undefined S/T when address details specify Australia only (i.e. without S/T details). The S/T code for Undefined S/T is 0. This code is also used to code Population Census data when usual residence is not stated.
|
Example: | |
| S/T | SD | SSD | SLA | | |
| | |
| 0 | 88 | 88 | 9099 | Undefined S/T or for Population Census purposes—Not stated | |
| | |