Medium and large manufacturing enterprises emerged in the 1950s during the ISI period. These enterprises required the services of personnel managers, whose primary tasks were of controlling and disciplining employees. Thus, some of the PM recruits during that time had either police or military backgrounds, or, in most cases, had training in the discipline of law (Sison, 2003). The demand for the services of lawyers was reinforced by the huge body of labour laws enacted in the 1950s such as the Minimuni Wage Law (951), the Industrial Peace Act (953), and the Social Security Law (954). Also it should be noted that the 1950s witnessed a surge in unionisation in the manufacturing sector (Ofreneo, 1993). Later, the mining and wood industries and the sugar and banana plantations became a fertile field for the recruitment of members by the resurgent unions.