ThisdocumentcapturestheimplementationofrequirementsthatpertaintotheDieselExhaustFluid(DEF)TankHeadUnit,whichincludestheDEFTankHeadUnitSensorArray(DEFTSA),andMechanicalInterfaceRequirements.Thisdocumentcoversboththeelectricalandmechanicalportionofthesystem.