Such a provision exists in the Karnataka Shops and Establishment Act. The Shops and Establishment Act in Karnataka originally prohibited employing women workers after 8pm. However, this act was amended to enable women employees to work in BPO industry, where night shifts are common. The amendment allows the companies to have female workers work past 8pm, provided the companies adequately take care of their security and maintain safe work environment for them. Thus, the employers were mandated by the rule to provide transportation and other security measures for women employees who work past 8pm. To my knowledge there is no specific decision of Supreme Court/High Court giving direction for providing security guard facility to female staff at night shift.