Beware, Registration does not give you exclusive rights/ownership or marketing of the name unless you have ensured as much as possible, that you are not going to infringe upon someone's registered or pending Trademark.
An Identical business name can also be registered by other people in each of the other states.
Prior to applying for a Business name or Company name, it is highly recommended that you ensure as much as possible, that your proposed name is not going to infringe upon any other organisations Trademark rights, by having some form of 'search' conducted.
Do not rely upon business registration or company registration to protect you......Trademark registration will! Trademark registration, if possible, will give you exclusive rights.
Business Name Registration in WA $190 (inclusive of GST, Professional fees and Government)
Click Here to Register online