Color laser prints are not cheap. Using preprinted forms would be cheaper and more secure. If jobs are done in batches, switching forms is really not an issue.
Further, it would be strange to have the green design extend past the border if it wasn't going to go to the paper edge; most printers would have a hard time doing the latter.
That green basket weave paper is a stock paper without any boarders. I recently sent for a Certified copy of my BC from Idaho. It came on that same green basket weave as the FAKE Obama COLB and the same green basket weave as the REAL DeCosta COLB. The difference between mine and their's though, is mine had the original ledger card in my mothers writing with all the pertinate info, and the doctors signature. I was born at home. This was then COPIED onto that green basket weave paper. Stamped with an embossed seal and dated and signed. Saying it was a Certified copy of the original.