All items subject to the Export Administration Regulations (EAR) require authorization for export to Cuba either by an individual validated license or license exception. If your item is eligible for shipment under a license exception, it is incumbent upon the exporter to properly report in the Automated Export System (AES).
In recent months, the Bureau of Industry and Security (BIS) has identified many transactions coded as “No License Required” (NLR) (Code C32/C33) that were not properly filed under the correct AES code corresponding to the appropriate BIS license exception. Only shipments of informational materials and certain other items that are not subject to the EAR may be designated in AES as NLR. All other shipments of items require use of the appropriate AES code corresponding to the BIS license exception rather than NLR.
For example, eligible shipments to Naval Station Guantanamo Bay should be made under License Exception GOV (Code C42) and eligible shipments of gift parcels to family members in Cuba should be made under License Exception GFT (Code C43). In addition, items eligible for License Exception Support for the Cuban People should be made under License Exception SCP (Code C62).
To read the article: BIS