you represent that you are a ` natural person ' who is over the age of eighteen -lrb- 18 -rrb- years old , or over the age of majority in the country where you are a citizen , and agree to these terms of use on behalf of yourself and , at your discretion , for one -lrb- 1 -rrb- minor child for whom you are a parent or guardian and whom you have authorized to use the account you create on the service .