What's ORP? The curent practice is it 21 or 26 days?
This is no right or wrong, correct ? Whats ROP btw? For 5 working days a week November is 21 days. To use 26 also? Not 21? may I know the title of this book? What is the previous/current practice then? 26 days? The law always say, deduct the minimal not more.