of Toronto, and is a prominent identifier of the agency. As one graphic design expert stated, it achieved "an enviable goal that most graphic designers strive to accomplish with any logo they design". Only one minor revision was made after the original version was unveiled: while the G and O used to touch each other, a gap now exists with a bolder white T to enhance them. The primary corporate colour was known as "GO Green", matched the green on Ontario Highway signs, and was used on all vehicles, signage, and printed material. In 2013, GO introduced a two-tone colour scheme that changed the primary colour to a darker green, and added a second lighter apple green. The changes were made to better harmonize with the branding of Metrolinx and its other operating divisions, as well as to improve its display digitally. Safety and security By-law No. 2 GO Transit By-law No. 2 is a document of rules and regulations governing actions of passengers and employees while on GO Transit property, which includes land, facilities, trains, buses and other structures. Besides issues relating to fares, the by-law specifies permissible and prohibited actions such as staying in designated safe areas, commercial or distribution activities, parking and other personal actions that promote or endanger the safety of passengers. It covers items like paying fares, parking, general behaviour, fines and rule enforcement. These rules can be enforced by a "proper authority" which is defined as "an employee or agent of GO Transit wearing a GO Transit uniform [or] carrying an identification card issued by GO Transit, a GO Transit Special Constable, or a municipal police officer". Any contravention of the by-law can result in a fine under the Provincial Offences Act. Enforcement GO Transit employs Transit Safety Officers, who are designated special constables that patrol Metrolinx properties, and are responsible for ensuring passenger safety and protection, enforcing relevant laws or by-laws, offering customer assistance and supporting local police, fire and ambulance, and promoting railway safety. Under the Police Services Act, Transit Safety Officers are appointed by the Commissioner of the Ontario Provincial Police, with approval from the Minister of Community Safety and Correctional Services. In addition to By-law No. 2, they have the authority to enforce other certain federal and provincial laws. GO Transit also employs Provincial Offences Officers, known as Revenue Protection Officers, to enforce the proof-of-payment system. GO Transit operates a