It seems very simple in my county: call them, set up a time for them to come out, they re-measure, and there is no fee.

If a tenant gets injured on your property and sues, you better believe that the attorneys will be sending someone to take photos, inspect conditions and take measurements of the area the person claimed injury.  

Since commercial properties often (though not always) trade based on cap rates, then they can be a useful measure of comparing two properties. 

The Army, in an attempt to assure me a measure of success, will allow me to participate in an UNPAID internship of my choosing.

Those measurements grow and shrink as population density decreases.

There is only the underlying risk of the asset and market, as measured against the expected return.  

I'd treat all of this like rumor and operate under the assumption that I still had a valid P&S until proven otherwise.This seems like a CYA measure for the agent and seller who entered into a contract with you without fulfilling the obligations of a prior contract.

Measure the walls and figure out the biggest TV that will fit.

It's just a measure to assess taxes.

While it is not a perfect measure of whether or not a property will yield a profit, it has been shown to be a good “rule of thumb” for determining approximately how much to charge for rent on any give property and if that rent will be enough to cover the mortgage.The basic idea is to take the total cost of the property and any necessary repairs and multiply it by .01 (1%) and then use that figure to plan how much one will charge a tenant.