Still not sure what the sticker he was asking for was, but I looked up the nitrous law and really enjoyed the law that immediately followed it, so here they are:
Nitrous oxide fuel systems prohibited
172.1 (1) No person shall drive or permit to be driven on a highway a motor vehicle manufactured or modified after its manufacture such that nitrous oxide may be delivered into the fuel mixture unless,
(a) the part of the fuel system that may connect to a canister, bottle, tank or pressure vessel capable of containing nitrous oxide can be clearly seen by looking at the interior or exterior of the motor vehicle;
(b) there is no canister, bottle, tank or pressure vessel connected to that part; and
(c) if the part of the fuel system that may connect to a canister, bottle, tank or pressure vessel capable of containing nitrous oxide is located inside the passenger compartment, there is no canister, bottle, tank or pressure vessel capable of containing nitrous oxide in the passenger compartment. 2007, c. 13, s. 22.
Same
(2) No person shall drive or permit to be driven on a highway a motor vehicle manufactured or modified after its manufacture such that nitrous oxide may be delivered into the fuel mixture unless,
(a) the part of the fuel system that may connect to a canister, bottle, tank or pressure vessel capable of containing nitrous oxide is completely disconnected from the part of the system that connects to the engine;
(b) the disconnection can be clearly seen by looking at the interior or exterior of the motor vehicle; and
(c) the disconnected parts cannot be reconnected from inside the passenger compartment. 2007, c. 13, s. 22.
Offence
(3) Every person who contravenes subsection (1) or (2) is guilty of an offence and on conviction is liable to a fine of not less than $500 and not more than $2,000 or to imprisonment for a term of not more than six months, or to both. 2007, c. 13, s. 22.
See: 2007, c. 13, ss. 22, 49 (2).
Horse racing on highway
173. No person shall race or drive furiously any horse or other animal on a highway. R.S.O. 1990, c. H.8, s. 173.
So they specifically ban being fast and furious…On your horse…