When i create MM01 for a material i want to validate the DIVISION (SPART)

Hi friends,

When i create MM01 for a material i want to validate the DIVISION (SPART) field while i click SAVE button.

Ie if my material no is FERT the division should 'XY'.

if my material no is HALB the division should 'ZZ'.

So what is the user exits we apply here and steps pls.

Moosa