This has been covered before but here ya go, Go down to your local walmart, Pet shop or ACE hardware Get a dogtag made that reads:
Gasoline Engine Factory
48.5 CC
Made 4-15-2009
EPA cert 123456
and then rivet it over your clutch arm cover, or just make something similiar in ms paint on some photo paper and use some clear packing tape over it.
DISCLAIMER: the following was merely hypothetical, I in no way shape or form condone misrepresenting an engine to circumvent any laws