In Chapter 5, however, members are entitled to "actual and reasonable" expenses, meaning you could claim more than the meal-time rate, if it was actual and reasonable.
That's not true at all. Before you question me, my pedigree includes compensation and benefits and I am well in tune with this sort of thing.
In simple terms, "actual" means you need a receipt in order to make the claim (to see what you actually spent) and "reasonable" means up to the limit proscribed in the NJC meal rates for that meal in that geographical area. In other words, for the most part, you cannot
claim more than the meal rate. The only exception is that the Minister can approve reimbursement at a higher amount, but you would have have a pretty hard time justifying it.
As for your original question, others have since answered it. The "place of duty" is normally the geographical boundaries set for your particular unit. By and large, these are the same as the PLD area, but Toronto is a notable exception.