Australian Tax File Number

A 9-digit number issued by the Australian Taxation Office (ATO) to each taxpayer.

Australian Tax File Number — Validates position weighted Mod 11 checksum.

Regex expressions	Description	Score
`(?i:\b[0-9]{9}\b)`	Matches a 9-digit number without a delimiter.	1
`(?i:\b[0-9]{3} [0-9]{3} [0-9]{3}\b)`	Matches a 9-digit number of the format NNN NNN NNN delimited by space.	1
`(?i:\b[0-9]{3}-[0-9]{3}-[0-9]{3}\b)`	Matches a 9-digit number of the format NNN-NNN-NNN delimited by hyphen.	1

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