Hi Mamta,
True, one or two days of sick leave doesn't require a MC. But there is more to look at your SLeave policy/SO rather than the legal requirement. As an employer/HOD I would have to discharge greater responsibility, to ensure the production or day-to-day operations doesn't suffer due to unsolicited & unplanned absence of key personnel from duty. While employees can have all the privileges & rights to avail leave at will as per statutory provisions, it goes without saying they will have greater responsibility as well that his/her unplanned leave doesn't suffer beyond manageable limits. Requirement of MC, reasonbly beyond 3 days, (good enough to care mild fever, cold, body ache or consultation with experts/lab tests etc. such reasons common though) has to be ensured in order to curb misuse of emergent provisions available on health grounds. While saying so if the extant rules/SO permits SL without MC I have nothing to say.