LOV Extension in eBusiness OAF

Using E-Business OAF framework 11.5.10.7RUP - iProcurement

I have a requirement to cut down the list of Expenditure Types in an LOV according to criteria picked up from the base page.

From SHOP Create a requisition and check it out .Then edit requisition lines . Then enter Billing information

The requirement is to cut down the Expenditure Type list in the  LOV to include only data matching a field in the base page

I have extended the VO behind the expenditure type Lov  to include an extra field (matching the field in the base page). This field is then being used as a search criteria from the  value in the base page.