What should a civil servant do if he is slapped by a Minister or MLA?

The proper thing would be to objection aganist him. Actual maltreatment of government official isn't satisfactory at all.

What's more, that MLA ought to be rebuffed under the law

What message will it provide for the general public? Nobody would have the regard for such organizations if such things occur .

No would pay attention to IAS or IPS in the event that they are slapped or manhandled each now and, at that point .

It would prompt a destruction in the general public as individuals' dynamic support in majority rules system would be drained.