Section 62(1)(a) in Arunachal Pradesh Municipal Elections Act, 2009
(a)any ballot box used at a polling station or at a place fixed for the poll is unlawfully taken out of the custody of the Presiding Officer or the Municipal Returning Officer or is accidentally or intentionally destroyed or lost, or is damaged or tampered with to such extent that the result of the poll at that polling station or place can not be ascertained, or