(a) the parties making the admission fully understand their rights and fully understand the potential consequences of their admission to the allegations;
(b) the parties making the admission voluntarily, intelligently and knowingly admit to all facts necessary to constitute a basis for court action under this chapter;
(c) the parties making the admission have not in the reported admission to the allegation set forth facts that, if found to be true, constitute a defense to the allegation; and
(d) the child making the admission is effectively represented by counsel.