Sir, I can tell you that in 32 years in policing, I have never yet seen anyone who has a lawful reason or a legitimate reason for removing it while doing an oil change or repair work. Subsection 354(2) is what we have always referred to as the presumption section. And it does refer in proposed subsection 353.1(1) to a “lawful excuse”.
What you're now doing, by putting in proposed subsection 353.1(3), is giving the criminal element a new reason for or a new way of giving excuses for obliterating numbers.