officer given under section 8(4) arose from circumstances beyond his control. Obstructing free passage of any ambulance, etc. 18. Where a person at, or in relation to, an assembly or a procession conducted pursuant to a permit — (a) acts in a disorderly manner for the purpose of preventing the transaction of the business for which the assembly or procession assembled; (b) obstructs the free passage of any ambulance, fire engine or vehicle belonging to the Singapore Police Force or the Singapore Civil Defence Force or, otherwise than in the manner and to the extent authorised by the permit relating to that assembly or procession, impedes or disrupts the use by members of the public in general of any road; or (c) incites other persons to do so, the person shall be guilty of an offence and shall be liable on conviction to a fine not exceeding $10,000 or to imprisonment for a term not exceeding 6 months or to both. Legal immunity for participant in lawful assembly or procession 19. If an assembly or a procession — (a) is the subject of a permit; (b) is peaceful; and (c) is held in accordance with the conditions imposed on the permit, a person who takes part in the assembly or procession, does not, merely because of his taking part, incur any civil or criminal liability because of the obstruction of a public place. PART III SPECIAL EVENTS SECURITY Interpretation of this Part 20. In this Part, unless the context otherwise requires — “approved person”, in relation to any power under section 22, 24, 27, 28 or 29, means any of the following persons approved by the Commissioner in writing to exercise such power under that provision at or in relation to a special event Singapore Statutes Online Current version as at 01 Oct 2018 PDF created date on: 01 Oct 2018