All of the holes are
TP Dia.|1.0MMC|A-B|C MMC - D MMC|

At one time they also had an E datum assigned to one of the holes in A1 surface but now removed. My question is can you have -A- assigned to the same plane as -B- they are parallel surfaces.

Regards,

Geoff
Sr. CMM Programmer
Lapeer Metal Stamping
LMS Metrology Lab
Lapeer, MI