class characteristics as MIC ?

Hi Gurus,

Bach class assigned  to material is getting copied into QS61 for ex : i am assigning a Bach class to a material the class characteristics assigned to the class is getting copied  into MIC .

the class contain 3 class characteristic and one characteristic only assigned to MIC remaining two are not assigned to MIC . but one class characteristic  which  not assigned to MIC also getting copied into MIC.

can anybody please let me know through which configuration the the class characteristic is getting copied in to MIC.

Regards,

Mahesh.