Working conditions are laid down in the Ley federal del Trabajo (Federal Labour Act). The statutory working week is 48 hours, from Monday to Saturday. There is no specific official retirement age in Mexico. However, workers who have contributed to the Mexican social security system, managed by the Instituto Mexicano de Seguro Social (IMSS), are eligible for a retirement pension starting at the age of 60. Employees are entitled to an uninterrupted paid annual leave of 12 working days after completing their first year of service. For each additional year of service, this leave increases by two working days. Starting from the sixth year of service, the leave increases by two days for every five years of service (Arts. 76 and 78 Ley Federal de Trabajo). Overtime work must be financially compensated at double the regular pay and triple for work on Sundays (Arts. 74 and 75 Ley Federal de Trabajo). Under the current legislation, maternity leave is 84 days, with 42 days taken before the birth and 42 days taken after the birth. Paternity leave is 5 days.