Black of the Plate - Strike?

[bd41flpk]

This is specifically an ASA 'slow-pitch' question: Would like to know if there's any rules reference as to whether a ball that exceeds the two corners of the plate and is considered to 'hit' the side (aka black) part of the plate can be considered a 'strike'?

I recall a few years back that this was in fact a rule put in play; however, I cannot locate a reference to this?

Any help is appreciated.