I was reading this question as a less technical one and more a question of - how do you know if you've got a ticket or not?
Is that correct?
You'd like to know did they photograph your rego plate and then you'll get that ticket in the mail in a couple of weeks time... or - do they wave frantically at you to make you pull over so they can issue their speeding infringement... Or... Do they jump in their car and give chase to you at high speeds with lights flashing etc...
Well - not sure I have the answers anymore - considering there's speed detectors in-car now-a-days... You could be driving happily along, minding your own business, breaking that 10% rule... and whammo... pulled over with an accurate speed reading from a cop that was going the other direction....
So my answer is - you'd have to be pulled over.
The general rule is - stay UNDER 10% over the speed limit... So for a 50km/h zone, do no more than 54km/h - but make sure you have an accurate and well calibrated speedometer. If it isn't, your 10% could be out and you'll be in for a ticket.
The way I calibrate is I use GPS and stay at a constant speed. My speedometer is within 1% accurate to the GPS over 5km!!!