[Histonet] New CAP question

[Stacy McLaughlin]

ANP 22760:  Are new lots of antibody and detection system reagents tested in parallel with old lots?

Note: New lots of primary antibody and detection system reagents must be compared to the previous lot using an appropriate panel of control tissues.

How is everyone out there handling this?
What makes up a panel of control tissues?  We are currently doing this by staining a control slide and comparing the results to the previous lot.  Looking for guidance.
Thank you for your help!

Stacy