[ADXA] Challenge award question

[Dennis Schaefer]

 I have my QSL cards better organized now and have some to submit for the Challenge award.  I have some for my former call, WA5IIS, and some for my current call, and I have not been able to find anything about this in the DXCC instructions.

My original DXCC certificate was issued to WA5IIS and I switched to W5RZ in the late 70’s.  Can I just mix the cards together, sorted as a whole by band and mode?  Or do I need to keep them separate?  

73,
Dennis