An item, technology, or service associated with an Export Control Classification Number (ECCN) under the Commerce Control List (CCL) may need export approval depending on the reasons for control.  The process of determining and evaluating the reasons for control may be a bit cumbersome but can be found on the BIS website under Commerce Control List (CCL).

Navigate to the CCL and open the "Category" page associated with the ECCN.  Search for the ECCN and at the top will be a table labeled "Reasons for Control".  That table and the verbiage underneath will help you determine if your ECCN needs approval before export.  Approvals for ECCNs can come in the form of a SNAP-R license or exception.