sarbanes-oxley and taking over

Hello, Let's say we have company A and company B. Company A is located in US, listed on NYSE and comlied with SEC rules and Sarbanes-Oxley Act (SOX).
Company B is located abroad, not listed on NYSE or NASDAQ.
Let's say TODAY company A is over taking company B. Now my question is: when company B shoud meet with SOX requirements? In my oppinion the deadline is 1 year after takin-over but I may be wrong.... Could anybody tell me what's the real deadline for the compliance with SOX, e.g. implementation of internal control, audit over financial reporting etc.?
Thanks for any hints. Zaggy
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