Regarding the "national economic interest" standard, apparently the OECD has criticised Canada for not fully implementing this Convention standard its legislation. From the OECD's country report on implementing the Anti-Bribery Convention:

In Phase 2 the Working Group on Bribery recommended that the Canadian authorities clarify that, in investigating and prosecuting CFPOA cases, “there are no proper considerations of national economic interest, the potential effect on relations with another state, or the identity of the natural or legal entities involved, and establish guidance to prosecutors on how to proceed when they decline to prosecute a case that potentially involves one of the public interest factors in the FPS Deskbook”