PositionMaintenanceRequest can be found in Volume5 of the specification PositionMaintenanceReport can be found in Volume5 of the specification RequestForPositions can be found in Volume5 of the specification RequestForPositionsAck can be found in Volume5 of the specification PositionReport can be found in Volume5 of the specification AssignmentReport can be found in Volume5 of the specification The Intention of this block is to supply underlying amounts, dates, and settlement status for Derivative Positions PosUndInstrmtGrp is a component