Must be formatted as:
Mandatory in mandatory sequence A
This field specifies whether, from the Sender's point of view, the option is sold or bought, is a put or call, and indicates the style and the underlying currency.
Code 1 must contain one of the following codes:
Code 2 must contain one of the following codes:
Code 3 must contain one of the following codes (Error code(s): T09):
Currency must be a valid ISO 4217 currency code (Error code(s): T52).