After reading your last post only I understand better your question. Can you add load after refueling completed if the fuel quantity you took with the initial zfw will make you land at mlw? If yes how much?
Yes you can, but you have to burn the equivalent weight of fuel in order to land at mlw (by holding or by flying at lower level, etc...) Off course not exceeding the mtow.
How much? As much as you want as long as it is less than mzfw, here 62.7t.
Actually I think the terms you use are not very appropriate so that's why it is mixed up a bit like "limited by planned zfw" "ZFW limited t/o weight" ... there is only one structural limitation of zfw which is the mzfw.
Hope it helps.