Using area still murk the waters. Some people may be legitimately meaning something other than market when they say area. So it's not really possible to say tha

Using area still murk the waters. Some people may be legitimately meaning something other than market when they say area. So it's not really possible to say that every market occurrence can be replaced with market in the internal emails. This is not the definitions section of a contract, it's a guideline. So, it's probably still worth doing. If they don't, then people using market have 100% chance of meaning market, whereas after the guideline, usage of area has less than 100% chance of meaning market and being accepted like so.