Validation in Treasury

Hi ,

Is there any way to define validation rule for Treasury module.

my requirement is :

let says when user create  a contract taking short term product type ( description of PT  is  more 90 days but less than 365 days ). now system should validate the date duration of the contract if the difference between start date and end date is more than 90 days and less than 365 day then system will allow to create the transaction but if it is less than and more than 365 days then system should not allow to create the contract for this product type.

Thanks