These can be applicable for many European countries, Canada, Singapore, Australia etc.
1 e.If their minor children will be about to turn 18 years old,can't be got the immigration VISA and got temporary resident status!
2 Citizens and permanent residents' spouses or minor children (under 18 years old) will not wait for waiting period.If citizens and permanent resident handle the immigration for spouses or minor children,they can go to the country soon.