How to make Project, Task, Expenditure Type, Expenditure Item Date and Expenditure Organization

Hi

Recently we have implemented Project Accounting and we have not made Project Information Mandatory in iProcurement Requisition, Purchase Order Distribution and AP Invoice entry, due to this user is able to ENTER REQ/ PO/AP Invoice without Project and task information, due to this, Project is not cost booked from those PO where user has missed to enter Project and Task Information.

I would like to check if there is any easy way (WITHOUT Customization ) to make following fields Mandatory at following Places

iProcurement Requisition Distribution

Purchase Order Distribution Screen &

Accounts Payable Invoice Distribution

# Project Number

# Task Number

# Expenditure Type