Is it possible to freeze the price of an item on the requisition page?

On the requisition page, we use the 'Enter Requisition Line' option. After entering the item, it retrieves the item details and the price from item-level attributes, specifically the list price of the item.

For certain items, specifically service items, we want to restrict users from editing the price. Is there a possible way to achieve this so that users cannot edit the item price while raising an indent?