I remember seeing one car, can't remember if its CDN or US thought, but anyhow, this guy had a decal made of his front plate and he stuck it on the bumper.
In your case the Ontario lettering would be on the top of the bumper, your actual plate alphanumeric lettering on the black bumper trim, and the rest below either tucked underneath the next piece in the bumper. They can't give you a ticket from not showing your license on the front, it's there. there is no law that says it can't be in the form of a sticker either.
'98 (04/98) 540i/6 Biarritz Blue / Sand Beige
Options: 17" Style 32 Staggered / Sport Seats / Xenons / Sport Suspension / 6 Speed / Cold weather Pkg
Mods: M5 Grill, CDV, AE Xenons, Rogue Engineering Octane Short Shifter w/ WSR, Rogue Engineering Performance Transmission Mounts, Royal Purple Synchromax Transmission Fluid, Gruppe M Filter Ram Charger
My Car Site