Used to limit the application of restrictions to a subset of standard Association of American Railroads Pool Codes
Code indicating a Yes or No condition or response.
If APR01 is ``Y'', then restriction is included. If ``N'', then restriction is excluded.
Code identifying a pool of equipment assigned to a specific shipper.
Code identifying a pool of equipment assigned to a specific shipper.
APR03 indicates the high end of a range.
