It used to be paid at the 18 month anniversary of the accident. However, due to a recent 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.