A、<span style="FONT-FAMILY: 宋体;FONT-SIZE:12pt;"><font face="新宋体">通知业主后即可调换</font></span>
B、<span style="FONT-FAMILY: 宋体;FONT-SIZE:12pt;"><font face="新宋体">无需通知业主即可调换</font></span>
C、<span style="FONT-FAMILY: 宋体;FONT-SIZE:12pt;"><font face="新宋体">取得业主书面同意后才能调换</font></span>
D、<span style="FONT-FAMILY: 宋体;FONT-SIZE:12pt;"><font face="新宋体">合同签订后不允许再调换</font></span>