Reading instructions

Each message or component block is presented in a table. Each table row is a message field or component block having the following characteristics:

Tag characteristic: `Required`	Description
yes	Mandatory tag
no	Optional tag
yes, conditionally*	Conditionally required tag. The condition is provided after `*` in the corresponding description.
yes, by Revolut FIX Gateway	Tag is required by Revolut FIX Gateway, but not required by the FIX 4.4 standard
yes, by FIX 4.4	Tag is not required by Revolut FIX Gateway, but required by the FIX 4.4 standard