I had to replace the old engine compartment mounted extinguisher (31' boat) as it was a halon unit that was 12 years old and needed pressure test that could no longer be completed (even by the extinguisher manufacturer.) The new one has a manufacture date of 02/2012 with the filled weight embossed right on the label by the date. My question is does this new unit have to be sent out to have someone put it on a certified scale too, or is the fact that it was made last month and stamped on the cylinder with its weight sufficient for this year's service in the eyes of the coast guard?