In Canada, labour legislation comes under provincial and federal jurisdiction. Major institutions such as banks and the transportation sector are federally regulated. They account for about 6% of Canada's employees.
All the provinces have labour standards aimed at protecting Canadian employees who take certain types of leave, such as compassionate leave for a gravely ill parent and leave for a missing or murdered child.
The Canada Labour Code has been amended. This is a common practice. When the Employment Insurance Act is amended, the Canada Labour Code is as well in order to ensure that workers' jobs are protected while they are receiving employment insurance benefits.
Regarding whether the provinces will amend their legislation or not, that is their jurisdiction. It is up to them to decide what they want to do with their labour legislation.