Indian Penal Code, 1860
Chapter X - Of Contempts of Lawful; Authority of Public Servants
IPC Section 186
Obstructing public servant in discharge of public functions.
Whoever voluntarily obstructs any public servant in the discharge of his public functions, shall be punished with imprisonment of either description for a term which may extend to three months, or with fine which may extend to five hundred rupees, or with both.