{
  "codes": {
    "COLL": "Relates to collateral management.",
    "SECL": "Relates to securities lending.",
    "STMT": "Relates to settlements."
  },
  "description": "Specifies the underlying reason code for an SSI instruction, in the format of character string with a maximum length of 4 characters.",
  "name": "ExternalSecuritiesPurpose1Code"
}