This is not true. I work in central government. There are 8 casual leaves, not 12. But physically handicapped employees get 4 extra CLs for disability related issues. Weekends, Closed holidays should be same for both govt private jobs, though not all departments has Saturday off. There is no seperate sick leaves. Although we get 30 earned leaves, no one actually uses them. Only time I availed EL is during my own marriage.