A number of progressive reforms were introduced during Colombo's time as prime minister. A housing reform law of 22 October 1971 introduced new criteria for land expropriations and provisions for urban renewals. Under a law of 6 December 1971, state funds were made available for the construction of a kindergarten in every local authority. A law of 30 December 1971 introduced new regulations covering protection of female workers and maternity insurance. The duration of maternity leave was extended two months prior to, and two months after confinement for all employees, and all female workers were entitled to an earnings-related indemnity, equal to 80% of earnings (including agricultural workers and tenant farmers). Also introduced was an entitlement to voluntary extra period of leave for six months during the first year of the child's life, with job security and an indemnity equal to 30% of earnings, together with an entitlement to paid absences due to the child's sickness during the first three years if the child's life. In addition, a special natality allowance was introduced for self-employed women in the agricultural, artisan, and commercial sectors.