REG 473/06, as Squishy points out.
http://www.e-laws.gov.on.ca/html/regs/e ... 0473_e.htm Definition
1. (1) In this Regulation,
"power-assisted bicycle" means a bicycle that,
(a) is a power-assisted bicycle as defined in subsection 2 (1) of the Motor Vehicle Safety Regulations made under the Motor Vehicle Safety Act (Canada), and
(b) bears a label affixed by the manufacturer in compliance with the definition referred to in clause (a). O. Reg. 473/06, s. 1 (1).
(2) A power-assisted bicycle is deemed to not be a motor vehicle under the Act. O. Reg. 473/06, s. 1 (2).
Pilot project re power-assisted bicycles
2. A pilot project to evaluate the use of power-assisted bicycles on highways is established. O. Reg. 473/06, s. 2.
Regulation of power-assisted bicycles
3. (1) Under this project, any person who is 16 years old or over may ride or drive a power-assisted bicycle on a highway. O. Reg. 473/06, s. 3 (1).
(2) No person who is the owner or is in possession or control of a power-assisted bicycle shall permit a person who is under 16 years old to ride or drive the power-assisted bicycle on a highway. O. Reg. 473/06, s. 3 (2).
(3) Subject to subsections (1) and (2) and despite the definitions of "bicycle" and "motor assisted bicycle" in subsection 1 (1) of the Act, the Act applies to a power-assisted bicycle and the riding or driving of a power-assisted bicycle as if it were a bicycle and not a motor assisted bicycle or motor vehicle. O. Reg. 473/06, s. 3 (3).
(4) Despite section 5 of Regulation 610 of the Revised Regulations of Ontario, 1990 (Safety Helmets) made under the Act, no person shall ride or drive a power-assisted bicycle on a highway unless he or she is wearing a bicycle helmet as required by subsection 104 (2.1) of the Act. O. Reg. 473/06, s. 3 (4).
Below is the Motor Vehicle Safety Act referred to in clause 1 (a) of REG 473/06 above.
http://laws.justice.gc.ca/en/M-10.01/ A power-assisted bicycle is defined in subsection 2 (1) of the Motor Vehicle Safety Regulations.
Here is the regulations.
http://laws.justice.gc.ca/en/showtdm/cr ... .C.-c.1038 Subsection 2 (1) defines a power-assisted bicycle.
http://laws.justice.gc.ca/en/showdoc/cr ... 630?page=1 power-assisted bicycle" means a vehicle that:
(a) has steering handlebars and is equipped with pedals,
(b) is designed to travel on not more than three wheels in contact with the ground,
(c) is capable of being propelled by muscular power,
(d) has one or more electric motors that have, singly or in combination, the following characteristics:
(i) it has a total continuous power output rating, measured at the shaft of each motor, of 500 W or less, (ii) if it is engaged by the use of muscular power, power assistance immediately ceases when the muscular power ceases,
(iii) if it is engaged by the use of an accelerator controller, power assistance immediately ceases when the brakes are applied, and
(iv) it is incapable of providing further assistance when the bicycle attains a speed of 32 km/h on level ground, (e) bears a label that is permanently affixed by the manufacturer and appears in a conspicuous location stating, in both official languages, that the vehicle is a power-assisted bicycle as defined in this subsection, and
(f) has one of the following safety features,
(i) an enabling mechanism to turn the electric motor on and off that is separate from the accelerator controller and fitted in such a manner that it is operable by the driver, or
(ii) a mechanism that prevents the motor from being engaged before the bicycle attains a speed of 3 km/h; (bicyclette assist©e)