Solution : https://service.sap.com/sap/support/notes/39472 (SAP Service marketplace login required)
Summary : 
      This SAP Note guides on configuring multiple country versions within a single client, applicable for several nations listed in the key words section. Customers wanting to execute their operations in countries A, B, and C from a single system need to customize standard organizational units via Transaction O035. Customization involves changing country-specific defaults and copying organizational units (for example, from 0001 to A001 for country A). This setup does not modify cross-client tables. Additionally, copying of controlling areas requires manual configuration, though as of Release 4.0A, these can also be copied.
Key words : 
customizing -> company structure                -> change country-specific defaults, function 'change country-specific defaults', function 'change country-specific dedaults', client                -> change country-specific defaults, change country-specific defaults, country-specific customizing environment, customizing -> basic functions -> set, additional key words rscico02, organizational unit controlling area, country-specific documentation
Related Notes : 
       
| 1375438 | Globalization Collection Note | 
| 168202 | Copying CIN customization from client 000 | 
| 81892 | Implementating a new country version | 
| 65934 | Country versions, Language versions | 
| 63805 | FAQ: Country-specific Customizing settings | 
| 63631 | FAQ: Documentation for country versions | 
| 31557 | The Multiple-Client concept of mySAP.com Solutions - Short O |