Canada Oil and Gas Drilling and Production Regulations (SOR/2009-315)

10 (1) Subject to subsection (2), an operator who intends to drill, re-enter, work over, complete or recomplete a well or suspend or abandon a well or part of a well shall obtain a well approval.

(2) A well approval is not necessary to conduct a wire line, slick line or coiled tubing operation through a Christmas tree located above sea level if

• (a) the work does not alter the completion interval or is not expected to adversely affect recovery; and

• (b) the equipment, operating procedures and qualified persons exist to conduct the wire line, slick line or coiled tubing operations as set out in the authorization.