The introduction of universally free secondary education was a major step in removing the institutional barriers to private sector and preferred government jobs that required secondary diplomas. The PNP government in 1974 also formed the Jamaica Movement for the Advancement of Literacy (JAMAL), which administered adult education programs with the goal of involving 100,000 adults a year. Land reform expanded under his administration. Historically, land tenure in Jamaica has been rather inequitable. Project Land Lease (introduced in 1973), attempted an integrated rural development approach, providing tens of thousands of small farmers with land, technical advice, inputs such as fertilisers and access to credit. An estimated 14 percent of idle land was redistributed through this program, much of which had been abandoned during the post-war urban migration and/or purchased by large bauxite companies. The minimum voting age was lowered to 18 years, while equal pay for women was introduced. Maternity leave was also introduced, while the government outlawed the stigma of illegitimacy. The Masters and Servants Act was abolished, and a Labour Relations and Industrial Disputes Act provided workers and their trade unions with enhanced rights. The National Housing Trust was established, providing "the means for most employed people to own their own homes," and greatly stimulated housing construction, with more than 40,000 houses built between 1974 and 1980. Subsidised meals, transportation and uniforms for schoolchildren from disadvantaged backgrounds were introduced, together with free education at primary, secondary, and tertiary levels. Special employment programmes were also launched, together with programmes designed to combat illiteracy. Increases in pensions and poor relief were carried out, along with a reform of local government taxation, an increase in youth training, an expansion of day care centres. and an upgrading of hospitals. A worker's participation program was introduced, together with a new mental health law and the family court. Free health care for all Jamaicans was introduced, while health clinics and a paramedical system in rural areas were established. Various clinics were also set up to facilitate access to medical drugs. Spending on education was significantly increased, while the number of doctors and dentists in the country rose. The One Love Peace Concert was a large concert held in Kingston on April 22, 1978, during a time of political civil war in Jamaica between opposing parties Jamaican Labour Party and the People's National Party. The concert came to its peak during Bob Marley & The Wailers' performance of "Jammin'", when Marley joined the hands of political rivals Michael Manley (PNP) and Edward Seaga (JLP).