if (!initializedSignedElements) {
try {
initializeSignedElements(spt);
SignedEncryptedElements elements = (SignedEncryptedElements) spc
.readCurrentPolicyEngineData();
PolicyEngineData parent = spc
.readPreviousPolicyEngineData();
if (parent instanceof SupportingToken) {
// Parent is a supporting token
((SupportingToken) parent)
.setSignedElements(elements);