It depends on the law. Often the law (usually just the specific provisions found unconstitutional) are immediately struck down. If there are wide decision to be

It depends on the law. Often the law (usually just the specific provisions found unconstitutional) are immediately struck down. If there are wide decision to be made instead of the the status quo with the unconstitutional law, then the court will give parliament time to make the rules. This is currently the case with the election law where it's considered unconstitutional but there a multiple legal ways to design a legal one. The choice, how the law should look like, was passed back to parliament.