4. (1) The planning, designing, establishing, constructing, operating, changing, expanding or retiring of any of the following things is defined as a major commercial or business enterprise or activity and is designated as an undertaking to which the Act applies: 1. A generation facility that has a name plate capacity of one megawatt or more but less than five megawatts and that uses oil as its primary power source. 2. A generation facility that has a name plate capacity of less than 200 megawatts and that uses water power as its primary power source. 3. A generation facility that has a name plate capacity of two megawatts or more and that uses wind energy as its primary power source. 4. A generation facility that has a name plate capacity of five megawatts or more and that uses biomass or natural gas as its primary power source. 5. A generation facility that has a name plate capacity of 10 megawatts or more and that uses waste biomass as its primary power source. 6. A generation facility that has a name plate capacity of 25 megawatts or more and that uses biogas as its primary power source. 7. A generation facility that has a name plate capacity of 25 megawatts or more, uses landfill gas as its primary power source and is located at a waste disposal site the establishment of which does not or did not require approval under section 5 of the Act. 8. A transmission line that is designed to transmit electricity at a nominal voltage of 115 kilovolts or more and is associated with a generation facility described in this subsection. 9. A transformer station or distribution station that is designed to operate at a nominal voltage of 115 kilovolts or more and is associated with a generation facility described in this subsection.  O. Reg. 116/01, s. 4 (1). (2) Revoked:  O. Reg. 273/11, s. 2. (3) Any expansion of or change in a generation facility, transmission line, transformer station or distribution station that would result in it becoming a thing described in subsection (1) is defined as a major commercial or business enterprise or activity and is designated as an undertaking to which the Act applies.  O. Reg. 116/01, s. 4 (3). (4) An undertaking that is designated under this section as an undertaking to which the Act applies is exempt from Part II of the Act if the undertaking is carried out in accordance with the Environmental Screening Process.  O. Reg. 116/01, s. 4 (4); O. Reg. 360/09, s. 4. (5) If the proponent of an undertaking submitted an environmental assessment or proposed terms of reference in respect of the undertaking to the Ministry before this Regulation came into force, subsection (4) does not apply to the undertaking unless, not later than 60 days after this Regulation comes into force, the Director of the Ministry’s Environmental Assessment and Approvals Branch has received written notice from the proponent stating that the undertaking will be carried out in accordance with the procedure set out in the Environmental Screening Process.  O. Reg. 116/01, s. 4 (5). (6) Subsection (4) ceases to apply to an undertaking if, in accordance with the Environmental Screening Process, the Minister gives the proponent a notice to prepare an environmental assessment.  O. Reg. 116/01, s. 4 (6).