(Full disclosure: I have two small children, and after the birth of each I opted to take the full year of combined maternity and parental leave to which I, as a Canadian who made sufficient contributions to employment insurance, am entitled. (canadianbusiness.com)
The only restriction is that you can't put the money you took out back in the same year (unless you have sufficient contribution room for it to be considered an additional contribution). (tsinetwork.ca)
CPP disability benefits are paid to persons who have made sufficient contributions to CPP and who have a severe and prolonged disability. (bhnlegalclinic.ca)