Canada Business Corporations Act
CBCA Regulation, Part 6 Shareholder Proposals
Section 53

For the purpose of subsection 137(7)…

For the purpose of subsection 137(7) of the Act, the prescribed period for giving notice is 21 days after the receipt by the corporation of the proposal or of proof of ownership under subsection 137(1.4) of the Act, as the case may be.