social security system and the electoral system. For her first state visit, Bachelet chose Argentina, arriving in Buenos Aires on 21 March. There she met with president Néstor Kirchner, with whom she signed strategic agreements on energy and infrastructure, including the possibility of launching a bidding process to operate the Transandine Railway. Domestic affairs Social policies In March 2006 Bachelet created an advisory committee to reform the pension system, which was headed by former budget director Mario Marcel. The commission issued its final report in July 2006, and in March 2008 Bachelet signed the bill into law. The new legislation established a Basic Solidarity Pension (PBS) and a Solidarity Pension Contribution (APS), guaranteeing a minimum pension for the 60% poorest segment of the population, regardless of their contribution history. The reform also grants a bonus to female pensioners for every child born alive. In October 2006 Bachelet enacted legislation to protect subcontracted employees, which would benefit an estimated 1.2 million workers. In June 2009 she introduced pay equality legislation, guaranteeing equal pay for equal work in the private sector, regardless of gender. In September 2009 Bachelet signed the "Chile Grows with You" plan into law, providing comprehensive social services to vulnerable children from ages zero to six. That law also established a social welfare management framework called the "Intersectoral Social Protection System", made up of subsystems such as "Chile Solidario" and "Chile Grows with You". Between 2008 and 2010 the Bachelet administration delivered a so-called "literary briefcase" (a box of books including encyclopedias, dictionaries, poetry works and books for both children and adults) to the 400,000 poorest families with children attending primary school from first to fourth grade. In March 2009, Bachelet launched the "I Choose my PC" program, awarding free computers to poor seventh-graders with excellent academic performance attending government-subsidized schools. During 2009 and 2010 Bachelet delivered maternity packages to all babies born in public hospitals, which are about 80% of total births. In January 2010, Bachelet promulgated a law allowing the distribution of emergency contraception pills in public and private health centers, including to persons under 14, without parental consent. The law also requires high schools to add a sexual education program to their curriculum. Student protests Bachelet's first political crisis came in late April 2006, when massive high school student demonstrations – unseen in three decades – broke out throughout the country, demanding better public education. In