Members do not receive a salary. They receive an allowance. The Parliament of Canada Act currently provides that for every sitting day a member does not attend the House, their income is cut by $120 a day. Three exceptions are within section 57 of the Parliament of Canada Act. Those reasons are: if the House or Senate was not sitting—if you didn't miss a sitting, you're not cut for missing a sitting; if you're on public official business; or by reason of illness. Pregnancy or parental leave wouldn't fall into any of those categories.
The procedure and House affairs committee recommended adding maternity or parental leave as a fourth category. The government has chosen to achieve the same end in a slightly different way because if it were simply added as a fourth category, that would be a blanket that would apply with no restrictions and no parameters until the House or the Senate chose to apply parameters.
The approach the government is recommending to Parliament in the budget implementation act instead would create a new power for the House and the Senate to create regulations for its own members. The details of how this would operate will be up to members themselves to decide, and the House would then have the ability to adopt an order setting out those regulations, if this amendment is adopted.
There would then be a subsequent stage whereby members would determine what those parameters would be. Would there be a limitation to the number of days? Would it be less than the full income for a specific number of days? Any number of parameters would be up to the House to determine for members of the House.
When the House adopts an order, that would have the power of regulations, which would then regulate how this would apply to members.
The specifics of the actual scheme will be for you to decide for members of the House.