It used to be paid at the 18 month anniversary of the accident. However, due to an amendment to the Transport Accident Act, interim impairment benefits can now be paid to accident victims at any time commencing 3 months after the accident. Provided an injury is stable, TAC can assess and determine the impairment applicable to that injury and pay a benefit. In the case of children, (i.e. victims under the age of 18 years), the final impairment determination is made at 18 years of age.