If you knew the answer why ask?
There are numerous threads on times to positive in the archives.
All tests are approved for 3 month conclusive negative results until the FDA or organisation similar to the FDA in your own country reduce the window time.
There are older generation tests still in use, even in industrial countries. Someone on the forum checked up with the tecting centre they used andwas told it was a first generation ELISA.
you only say 3 months for legal purposes but really i heard as little as 6 weeks reliable.