ABAP : Making CIN tab fields Obligatory

Making country version fields mandatory while creating the customer master data.

The aim was to make the country version fields like Pan Number, service tax registration number mandatory while creating the customer master data.

The challenge is, the user may not click the relevant tab (CIN tab) and hence the fields will not flow during run time or even they are not flown in any of the user exits. Assigning the CIN master data program SAPLJ1I_MASTER and CIN table J_1IMOCUST(memory area) to Field symbols ensuring the data pick during runtime. Also, assigning customer master data to field-symbols variable, ensuring the transaction is related to customer master data. 

*The detailed code as below: </p><p> considered 3 fields of CIN tab.