Dear KD,
It is as per law that basic salary for administration charge shall be Rs. 6500/- per month. But by mutual consent of Employer and employee it shall be increased, as in your case it may be your full basic salary. Second option is that you can write an application to your employer to deduct more amount from your salary whichever you can afford i.e. called Voluntary Contribution more than 12%. But in such case employer is not bound to deposit double of the share which you are suppose to deduct. Employer will deposit only on the ceiling of the basic salary.
Regards,
Jagdeep K Vashishtha