It was merely a policy (not an actual law) under the spousal sponsorship:
In February, 2005 former immigration minister Joe Volpe announced that Canadians would now, in certain cases, be able to sponsor their out-of-status spouses and common-law partners from within Canada. In September, 2005 an Operational Bulletin was issued clarifying how this policy would be applied. This bulletin included an “Administrative Deferral Policy” which set out certain criteria which would determine who would be allowed to stay here while their sponsorship was being processed and who could be removed before the process was completed.
[from ip08, section 12]:
12. Legal status in Canada
The current Regulations require that to be eligible for the spouse or common-law partner in
Canada class, the applicant have temporary legal status in Canada. However, under the spousal
policy, persons who are otherwise eligible for consideration under this class (and who are not
inadmissible for reasons other than “lack of status”) including those who have applied for
consideration on H&C grounds and submitted a sponsorship, may have this requirement waived.
This does not mean however that there is no longer any requirement to have legal status in
Canada. Persons who wish to study or work in Canada must still seek to obtain and
maintain the required permits. Applicants who do not have legal status in Canada may be
removed from Canada at any time.
Other than for lack of status, applicants must not be in any other violation of the Act or
Regulations or be subject to a removal order.
Since CIC has not published an Operational Bulletin for ip08, to remove this `policy', or `regulation' we have to wonder what that means for applications that CIC has received prior to this change. However, this blurb from CIC may be enough for them to not have to post, or publish everything that is changed:
In exceptional circumstances, operational bulletins may also be issued for one-time-only instructions or to provide urgent instructions to staff for a brief period while the relevant operational chapters are being updated.
Personally, I would think that the AOR lock-in date would in fact cover out of status applicants that had applied months ago and are patiently waiting, but...who knows.