ART. 15. In the vocational schools and institutes for girls there shall be a compulsory general course upon the following practical subjects: Cooking, laundering, ironing and starching, housekeeping, sewing and dressmaking. Along with this general course the pupils shall attend certain vocational courses chosen by themselves from sewing, lace making, and embroidery, artificial-flower work, etc. ART. 16. For admission to the schools of vocational instruction the following shall be the legal requirements as to age: (_a_) For vocational and agricultural schools, minimum age 13, maximum 21. (_b_) For the vocational institutes for boys, minimum age 10, maximum 13. (_c_) For the vocational institutes for girls, minimum age 7, maximum 13. (_d_) For the normal school of arts and trades, minimum age 14, maximum 25. (_e_) For the vocational finishing courses, minimum age 13. ART. 17. For matriculation in the vocational and agricultural schools and the finishing courses the candidates shall submit to an examination upon the subjects taught in the middle course of the primary school. In the commercial courses of the finishing schools, in the girls’ schools, and in the normal school of arts and trades, the entrance examination shall be upon the subjects of the final examination of the primary schools. ART. 18. The school year in the entire system of vocational instruction, with the exception of agricultural schools, shall begin March 1 and close November 30. The period from December 1 to December 24 shall be devoted to examinations and to school exhibitions. In the agricultural schools, because of their nature, the pupils shall have 60 days of annual vacation granted to them in groups by the director in accordance with the demands of the agricultural seasons and labors. ART. 19. The courses of the primary vocational schools, of the institutes, and of the finishing courses shall be divided into periods of 4 to 5 years; the finishing courses into periods of three years; and the commercial course of the schools for girls into a period of two years. ART. 24. The officials of inspection of technical and vocational instruction shall draw up annual statistics of attendance and of the results of the vocational instruction upon the bases of data furnished by the directors of the several schools and, so far as possible, by employers and by the former pupils who have themselves left the schools. These statistics shall relate to the following topics: (_a_) Number of pupils placed, with indication of the establishments where they are employed. (_b_) Initial salary obtained by them as related to the period of schooling. (_c_) Technical aptitude revealed by former pupils and their capacity of adaptation to the various industrial works. (_d_) Progress of increase in salary of former pupils.