Where certificate required
261 (1) The Governor in Council may, by order, (a) designate an interprovincial power line as an interprovincial power line that is to be constructed and operated in accordance with a certificate issued under section 262; and (b) specify considerations to which the Commission must have regard in deciding whether to issue such a certificate. (2) A person must not construct or operate any section or part of an interprovincial power line in respect of which an order made under subsection (1) is in force except in accordance with a certificate issued under section 262.
Source
https://laws-lois.justice.gc.ca/eng/acts/C-15.1/section-261.htmlCanonical document at the regulator. Always cite this URL — not the Vantage detail page — in compliance evidence.