They have mentioned "In Canada(Initial and Extension). While the term "extension" refers to international students already studying in Canada and have applied for an extension of study permit, the term "initial" refers to new applicants who have applied to study in Canada. As they have written "In Canada", I don't think the period applies to the applications being processed in the visa offices outside of Canada. But if its true that all SDS applications are processed within Canada then "initial" might be there to refer to the SDS applications.