DerivativeTimeUnit (Tag = 1271, Type: String)

Valid values:

'H'	Hour
'Min'	Minute
'S'	Second
'D'	Day
'Wk'	Week
'Mo'	Month
'Yr'	Year

Used in:

• Derivative Security List (AA)
• Derivative Security List Update Report (BR)
• Derivative Security List Request (z)