In the interest of "Consolidation," I found this to help clarify the confusion around five and ten year sentences. On IMM 14444 there is check box for Officer to select "Inadmissibility Provision(s)." One of those options is A36(2)c).
From text of Act on Canada's
"Justice Laws Website": Immigration and Refugee Protection Act
A36
Criminality
(2) A foreign national is inadmissible on grounds of criminality for
(c) committing an act outside Canada that is an offence in the place where it was committed and that, if committed in Canada, would constitute an indictable offence under an Act of Parliament;
(3) The following provisions govern subsections (1) and (2):
(a) an offence that may be prosecuted either summarily or by way of indictment is deemed to be an indictable offence, even if it has been prosecuted summarily;
So, this the exact verbiage that connects the dots from misdemeanor DUI to reason for Inadmissibility.