Windchill Parameters for Approved an Checked Drawings

Hello,
I hope you can help me.
I'm looking for the appropriate parameters to note on the drawing who checked and approved the drawing and when it was made.
I have already found the parameter for the creator (&PTC_WM_CREATED_ON and &PTC_WM_CREATED_BY) and am now looking for the parameters mentined above.
thank you in advance.