If the weight of my unmanned aircraft (UA) without any add-on items or modifications does not exceed 250g, but exceeds 250g if I incorporate these items or modifications, do I still need to register my UA?

You are required to register your UA if the total weight of the UA at the time of operations, including any add-on items or modifications, exceeds 250g. If you are unsure of the total weight of your UA, you are advised to register your UA.
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