The argument usually made is that such steps are necessary to ensure that American producers can compete in world markets and that "higher fences around fewer technologies" can safeguard what absolutely must be protected, and allow easier transfer of products that need not be.

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Williams insisted the club did not need to sell players, but did concede Rovers could not afford to make mistakes in the transfer window.

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The tax liability need not have been assessed at the time of the transfer, as long as the tax debt had accrued.

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