The committees deal with dismissals, transfers, suspensions, disciplinary action and other causes of difference, as well as with questions relating to the organisation of work and to industrial hygiene and safety." A statute of 1930 permitted teachers who had worked for 10 years to retire they were mothers of small children. This was later extended to all female workers. In the Fifties retirement benefits "were permitted for those who had been self-employed without ever having contributed to a retirement fund." In terms of housing a 1951 law sheltered the functionaries of the legislative branch. A law was passed in 1953 to meet the requirements of the banking retirement fund, which in accordance with the BHU administered funds for housing loans, and in 1954 a law was approved for members of the armed forces. A National Housing Plan was also approved, with considerable housing construction in Montevideo and the coastal cities taking place between 1970 and 1972. A law of December 1968, known as the 1968 National Housing Law, also greatly increased the number of housing cooperatives and "specified a detailed regulatory framework for housing cooperatives." In 1967 a new constitution was approved which instituted 9 years of mandatory education. Private training colleges that had been established in almost all towns in the interior on the initiative of the teachers' and parents' associations received a government grant in 1949 The number of school canteens and school milk services increased, as well as the school psychology services. New classes for handicapped children were also opened. In terms of secondary education, a law of 31 January 1957 "made official seven inland lycées, set up an experimental evening school inland and a day lycée and an evening lycée in the capita." In addition, a law of 29 November 1957 "increased by 9 million the 18 million pesos allocated by the 1950 law for the purchase of land the construction of new buildings for lycées and the adaptation and enlargement of existing schools." In 1934, a program of establishing low-cost restaurants where well-balanced meals could be served to workers at minimum prices was started. Such as restaurants in 1937-38 served "within a single year more than 1,500,000 meals in Montevideo and more than 2,000,000 in other parts of Uruguay." Paid industrial work done in homes was regulated and restricted by laws of 1934 and 1940, while a 1940 law fixed minimum standards for work on