http://www.gazette.gc.ca/rp-pr/p1/2015/2015-03-14/html/notice-avis-eng.php#ne1
Comments
This Notice of Intent is an opportunity for the public to provide comments and input into the proposed regulatory amendments described above before the regulations are published in the Canada Gazette, Part II.
Anyone may, within 30 days of the publication of this notice, provide comments on this Notice of Intent, in writing, to the person named below at the address provided.
Questions and requests for additional information, as well as comments on this Notice of Intent, may be directed to Teny Dikranian, Director, Legislation and Program Policy, Citizenship and Immigration Canada, 180 Kent Street, 6th Floor, Ottawa, Ontario K1A 1L1, 613-991-2485 (fax), Citizenship-Citoyennete@cic.gc.ca (email).
Once the regulations are published that's it. When will all that happen... Nobody knows.
Whoever wants to put an opinion and a comment about early implementation or about procrastination of the cut off month and date can use the above contact details until Mid-April. After that nobody knows what will happen.
My guess is that the Canadians will push with their comments the cut off date to be as early as possible after 15th of April.
On the other hand those who will apply in the next months will comment about procrastination.
Lets see who will win.