Read the question mansah;
does ICAO specify config to fly a dme arc or maybe even speed??
As pointed out by Alteburger, a speed range is specified under PANS-OPS, based on the category of aircraft if the arc is part of a procedure, from the Initial Approach Fix. A local AIP may stipulate a speed different to PANS-OPS (usually slower), as in the one quoted by Capt Claret. A procedure design expert would explain why, but I suspect it is because the specific range of speeds already mentioned would not allow clearance from terrain due to radius of arc.
Nowhere, does ICAO specify a config, because every aeroplane is different. By stipulating a speed (or speed range) they allow the operator to select an appropriate config to comply with the speed restriction(s).
So Air Cowboy, what is your reference for
Latest revelation... minimum clean speed
Perhaps a company restriction?
As an aside, the 160-240kts restiction for Category C aircraft (like the 737 and 757) is why the FMC descent speed defaults to 240kts below 10,000ft and not 250kts. You should hear some of the explainations I have heard for why it does that.............!
PP