What are the specific Acts and provincial and municipal regulations governing the contentious use of yellow lines?
Reg 298A of the National Road Traffic Act applies. The essential elements have been highlighted:
Prohibition on driving on shoulder of public road, except in certain circumstances
Reg 298A.(1) Subject to subregulation (2) and regulation 298(1)(e), no person shall drive a motor vehicle on the shoulder of a public road.
(2) Notwithstanding subregulation (1), the driver of a motor vehicle may, during the period between sunrise and sunset, drive such motor vehicle on the shoulder of a public road which is designated for one lane of traffic in each direction—
(a) while such motor vehicle is being overtaken by another vehicle; and
b) if he or she can do so without endangering himself or herself, other traffic, pedestrians or property on such public road;
(c) if persons and vehicles upon a public road are clearly discernible at a distance of at least 150 metres.