If any person, without lawful excuse, discharges any fire-arm in any port subject to this Act, or on or from any pier, landing-place, wharf or quay thereof, except a gun loaded only with gun powder for the purpose of making a signal of distress, or for such other purpose as may be allowed by the [Government] [Substituted by the A.O. 1937 for "Local Government ".], he shall for every such offence be punishable with fine which may extend to fifty rupees.