That is not new, that guidance has been present since the start of the annoncement of 2 stage processing. This new paragraph specifically mentions study permits approved after 18th March, this was not there before.
Foreign nationals who had a study permit application approved
after March 18, 2020 will be sent a letter (push notification) advising them that
- they may not be exempt from the travel restrictions
- they should not make any plans to travel to Canada until the travel restrictions are lifted, as they will not be allowed to travel to or enter Canada
The paragraph above referring to study permits approved before 18th March and study permit holders has also been revised.
It would appear IRCC are getting ready for widespread approval of study permits that were already approved in GCMS notes but those reseults have been withheld from applicants.