John , nothing is final in aviation and if one really wants to be pedantic then if it's in their OMA then it is certified .
Curious to know what speed you circle at with a 330 at max landing weight .
As you state strongly , the approach category is certified i.e fixed , so why change the category if you circle close to CAT D threshold . Seems you are in favour of changing from CAT C to D for "operational reasons " when it suits you .
Curiously enough , I know of at least one carrier which alters the max takeoff mass of their A321's depending on the sector it is flying to take advantage of the Landing fee's . Guess what , it miraculously loses 4 tons on these sectors with the flip of a placard in the cockpit , just saying ..with Airbus you get what you pay for .
BTW , follow the thread before you freak out !!!! I posted that link you claim in post 238 .