NLSS DD Class - Question as a matter of interest and importance

Can anyone answer this questions for me: If a school is running at FULL capacity, meaning all classes have reached their number of pupils cap, and one more child living in the school catchment area wishes to register for JK, is that child turned away and told that they must attend a school in the next town or is the school required to hire another teacher to open up more spaces, get a portable like in the old days if there is not physical room? What happens in this situation? I need a good firm answer on this one.