Authorization control at the time of budget release

Hi,

My business requirement is to have budget release control (Cj32) as per the below business requirement.

1.User 1 can release budget upto 50% of the budget allocated in CJ30

2.User 2 can release budget upto 90% of the budget allocated in CJ30

3.User 3 can release budget upto 100% of the budget allocated in CJ30.

Is there any authorization object/exit etc to map this requirement?

Any help will be appreciated.

Regards,

B P Singh