(1) Section 470 of the Principal Act is amended in subsection (1) -

(a) by inserting the following definition:

"'child' means an individual under the age of 18 years or, if over the age of 18 years and under the age of 23 years, who is receiving full-time education and in respect of whom the payment under a relevant contract has been reduced in accordance with paragraph (a) (ii) or (b) (i) of section 7(5) of the Health Insurance Act 1994;",

(b) by substituting the following for the definition of "relevant contract":

"'relevant contract' means a contract of insurance which provides specifically, whether in conjunction with other benefits or not, for the reimbursement or discharge, in whole or in part, of-

(a) actual health expenses (within the meaning of section 469), being a contract of medical insurance, or

(b) dental expenses other than expenses in respect of routine dental treatment (within the meaning of section 469), being a contract of dental insurance;",

and

(c) by substituting the following for the definition of "relievable amount":

"'relievable amount', in relation to a payment to an authorised insurer under a relevant contract, means -