They may not be accepted with no problem. Mostly it depends on the hive you are introducing the queen to. If they have just been queenless a few days (less than a week at max), you may get away with it (might not though). If they have been queenless longer than that you get into a whole raft of issues that will stop them accepting a queen direct introduced, and these issues vary depending just how long the hive has been queenless.
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