In most areas is govern by state regulations. Look there.
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Life is not a journey to the grave with the intention of arriving in a pretty, pristine body but rather to come sliding in sideways, all used up and exclaiming, "Wow, what a ride!"
Check out recent insurance examination records on each vessel. The Engineer/Surveyor for the insurance company will have used a particular standard appropriate to the country of interest. There will be contact details on the report, and a telephone call might be the next step.
Why are in-house tests being done in the absence of the insurance company's Engineer/surveyor? What purpose do they serve?
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"Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856