Scotland Bill

The debate at the moment seems to be concerned exclusively with primary legislation. Clause 2 is concerned with primary legislation made by Parliament, but the bulk of legislation these days is made by statutory instrument—made under powers that are granted by Parliament, of course, and many of these are existing powers—but I cannot see anything in the Bill that really grapples with the position of statutory legislation as opposed to primary. I wonder if that is an oversight or whether it is intended.