In some cases, those entering polytechnics or nursing and health technologies schools, should have some previous vocational training and preference will be given to applicants from the catchment area of the institution concerned. From the academic year 2005/2006 onwards, access rules have enforced minimum grades of 95 (out of 200) in the national access examinations for all candidates in every sector of public higher education. In practical terms, and unlike what happened in the past, the new rule meant the exclusion of a large number of applicants who otherwise would have been admitted with negative grades to the less selective courses of some public institutions, and consequently lead to a number of available places for students left vacant every year in many courses.