Read the given extract and answer the questions that follows:

What about subjects that do not fall in any of the three lists? Or subjects like computer software that came up after the constitution was made? According to our Constitution, the Union Government has the power to legislate on these 'residuary' subjects. We noted above that most federations that are formed by 'holding together' do not give equal power to its constituent units. Thus, all States in the Indian Union do not have identical powers. Some States enjoy a special status. Jammu and Kashmir has its own Constitution. Many provisions of the Indian Constitution are not applicable to this State without the approval of the State Assembly. Indians who are not permanent residents of this State cannot buy land or house here. Similar special provisions exist for some other States of India as well.
Who has the power to legislate on ‘residuary’ subjects?