Section 2A. The principal of any public or private school that provides instruction to pupils in any of grades 1 to 12, inclusive, shall immediately report any incident involving the unauthorized ignition of any fire within the school building or on school grounds to the local fire department. The principal shall submit a written report of the incident to the head of the fire department within 24 hours on a form furnished by the department of fire services. The report shall be filed without regard to the extent of the fire or whether there was a response by the fire department. The head of the fire department shall report such incident to the marshal in accordance with section 2.