Canadian Pacific Locomotive Sill Striping ?

Was there a particular year when CP started making the sills on their bright red engines … striped (dashed)? Versus a plain white sill?

In particular, their MP15 switchers.

Thanks

The white dashes on the CP sill started in 2003.

http://www.rrpicturearchives.net/showPicture.aspx?id=27137

The new design begin in 2013 with solid and dashing.

http://www.railpictures.ca/upload/mp15-1428-is-seen-in-transit-on-train-240-on-july-13-2013