Step 3Legality becomes iffy here
Cyansoft makes a pdf 417 barcode encoder, which you can use to modify the barcode.
If you select raw bytes(you can also select hex if you want to use a hex editor to edit the information) on how the decoded information is shown in the pdf 417 reader, examine it and you should be able to pick out your information such as d.o.b, name, license number, etc. You can edit that information, copy the selection into cyansoft's barcode encoder, and tweak it to look like the original barcode. Some of the settings you may need to change are the Error correction level, the number of columns and rows, and the bar width. The overall purpose of tweaking the barcode is to get it to look and read the same before, just with the modified data.
To test out the modded barcode, export it as an image and run it through the decoder again, if it works great, if not just keep tweaking the settings in the encoder until it looks exactly like the original. You now have your modded barcode, but what should you do with it?
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