Yes. (per pg 9-9 of the 2005 service manual)
Note that if you choose to reuse any copper seal washer it is recommended that you first anneal the washer by heating it blue-hot with a torch, keep it hot for about 30 seconds, then let cool (or quench as copper doesn't care much about rate of cooling, though I suppose quenching could warp it?). Remove surface oxide and you're good to go. This annealing resets the work hardening from previous use, and allows the washer to crush again as the plug is tightened, though it does NOT flatten it or remove the grooves and indents left by the plug, so some care and judgment should be applied. New seals are cheap, but if you don't have a new one a torch may get you out of a jam (but perhaps into a soup?).
-dave