Help with COPO

[Mr70]

It has no bearing on the paint color for this particular Malibu.
It was a notation included on a few vehicles in 1973,as some of it's options raised an internal flag that possibly this vehicle MAY BE Police/Taxi or used in the service industry,and it then MIGHT require a special color paint scheme.
It being A 454 BUT not being a Super Sport,fit that mold.
Notice they did not continue it with a Bypass code,F&SO # or even follow it up with ZP3.It's just a provisional alert if you will,but it went no further as this Malibu stayed an RPO.