}
if (notAfter != null) {
v.add(new DERTaggedObject(false, 1, new DERGeneralizedTime(notAfter)));
}
if (v.size() == 0) {
throw new CertificateExtentionConfigurationException(
"At least one of notBefore and notAfter must be specified!");
}
return new DERSequence(v);
}