Relation between ECCN and license

Hello,

I am sorry to ask a question again, but have been stuck on this for 2 weeks now.

We have an output for export customs declaration where the goods shipped are summed up by their USHTS number. Some of the lines get printed EAR99 No license required, and some are not. Do we have a direct relationship between those 2 ? Customs office says all those codes should have ECCN: EAR99... printed in the line.

Thank you

Regards,

Olaf