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Marta
Hello, my name is Marta - happy to help! the Hong Kong regulations only stipulate the type of test, i.e. LAMP is acceptable, so we suppose any, generic sounds less specific. If you're testing at the airport, they'll be happy to assist. Collinson Group is recommended by us and I'm sure they offer guidance.
When you said less specific, is it a good thing or bad thing??
I suppose good The lamp test is acceptable so really both of them fall into the category.