Art. 8. If any one of the scholars of the normal school shall desire to continue his studies for another year, in order to perfect himself therein, he may do so, on condition of paying from his own funds his annual board, if he shall be a resident student, and if, in the judgment of the director of the institution, no inconvenience arises from his remaining in it. Of the scholars of the normal school Art. 9. The resident scholars of the normal school shall be divided into regular [de número] and supernumerary [30] resident pupils. Both those who aspire to the said classes and to the class of day scholars, so long as there shall be any of the latter, must have the following qualifications: 1. To be natives of the Spanish dominions. 2. To be fully sixteen years old, that requisite to be attested by certificate of baptism or any other equivalent public document. 3. To suffer from no contagious disease, and to enjoy sufficient health to fulfil the tasks suitable for the duties of teachers. 4. To have observed good deportment which shall be proved by certification of the chief of the province and the parish priest of the village of his birth or habitation. 5. To talk Castilian; to know the Christian doctrine and how to read and write well: proof of which shall be made in an examination held before the director and teacher of the school. Art. 10. The regular resident scholars shall receive their education free, and shall pay nothing for their support, treatment, school equipment, and aid from the teaching force. [31] Art. 11. The regular resident scholars shall be obliged to fulfil their duties for ten years as teachers in the schools of primary instruction for the natives, to which they shall be assigned by the superior civil government. In case of not fulfilling that obligation they shall be indebted to the state for the expenses incurred in their education and teaching. The same thing shall happen if they leave the normal school before the conclusion of their studies without legitimate cause and by their own will or that of their parents, or are expelled from it for lack of application, or bad conduct. The model for calculating the expenses caused by said scholars during a given period shall be the board paid during the same period by a resident supernumerary scholar.