Delivery w/o sales order

Hi friends..

if we create a delivery LO w/o sales order then ,how the pricing procedre is getting determined in this case? or in my case system is directly taking the standard pricing procedre "rvaa01" insted of my own defined pricing procedre....

Note: generally delivery w/o sales order is used for sales promotion purpose or for supply of the free goods, but in case i need to maintain some pricing procedure for the same.then wht is the procudure?