Sets the value of ConditionCoordinateSystem attribute. This attribute represents a coordinate system used for the description of the connection properties in ConnectionCondition relative to the local coordinate system of RelatingStructuralMember. If left unspecified, the placement IfcAxis2Placement3D((x,y,z), ?, ?) is implied with x,y,z being the local member coordinates where the connection is made and the default axes directions are in parallel with the local axes of RelatingStructuralMember.