Section 21(2)(xi) in The Punjab Minimum Wages Rules, 1950
(xi)[ deductions made with the written authorisation of the employed persons (which may be given once generally and not necessarily every time a deduction is made), for the purchase of the securities of the Government of India or of any State Government or for being deposited in any Post Office Savings Bank in furtherance of any savings scheme of any such Government.] [Added, vide Notification No. 101-4-Lab-62/668, dated 6.1.1962.]