• The only characters allowed are letters, digits and a hyphen (-)
• Spaces are not allowed.
• The name should be between 3 and 63 characters long. (Shorter the domain the better).
• www. is not actually part of the domain name.
• You can buy as many domain names as you wish
• Domain names are NOT cAsE sEnSiTiVe - so abc.com.au is just the same as ABC.com.au

Rules for Australian Domain Registration
 

If you want to register a domain name in Australia, important rules apply. During the registration process, you will be required to meet the following requirements.

Popular amongst commercial entities, based in Australia, serving an Australian market. Must be an Australian registered company, or business to secure a domain, and must meet one of the following criteria:

• An exact match of the business’ name or trademark
• An abbreviation of the business’ name or trademark
• An acronym of the business’ name or trademark
• Product that the business manufactures or sells
• A program that the business administers
• An activity that your business facilitates, teaches or trains
• A service that your business provides
• A venue that the business operates
• A profession that is practiced by the business’ employees or members
• An event that your business organises or sponsors
• Place names in Australia are disallowed as domain names
• Domain names can be 2 to 63 letters, and words can be separated by hyphens, but not spaces

Charities, or not-for-profit organisations, as specified in your articles of association, you must be a registered company, or business, or incorporated association to acquire an org.au domain name and must meet one of the following criteria:

• exactly match the name of the registrant’s association, political party, trade union or other industry body, or club; or
• be an acronym or abbreviation of the name of the registrant’s association, political party, trade union or other industry body, or club; or
• be otherwise closely and substantially connected to the registrant, because the domain name refers to:
  1. a service that the registrant provides; or
  2. a program that the registrant administers; or
  3. an event that the registrant organises or sponsors; or
  4. an activity that the registrant facilitates, teaches or trains; or
  5. a venue that the registrant operates; or
  6. a profession that the registrant's members practise.

Applicants must either be an incorporated association, registered political party, registered trade union, or a sporting or special interest club operating within Australia, and must meet one of the following criteria:

• exactly match the name of the registrant’s association, political party, trade union or other industry body, or club; or
• be an acronym or abbreviation of the name of the registrant’s association, political party, trade union or other industry body, or club; or
• be otherwise closely and substantially connected to the registrant, because the domain name refers to:
  1. a service that the registrant provides; or
  2. a program that the registrant administers; or
  3. an event that the registrant organises or sponsors; or
  4. an activity that the registrant facilitates, teaches or trains; or
  5. a venue that the registrant operates; or
  6. a profession that the registrant's members practise.

Especially designed for individuals, who reside in Australia.

To be eligible for a id.au domain name, registrants must be:

• an Australian citizen; or
• an Australian resident.

id.au Domain names must:

• is exactly match the registrant’s personal name ; or
• be an acronym or abbreviation of the registrant’s personal name; or
• be otherwise closely and substantially connected to the registrant, because the domain name: derived from the registrant's personal name; or includes the registrant's personal name.