A public contract may be exempted from competitive bidding if the board, by majority vote, determines that an emergency exists and that conditions require the prompt execution of a contract. The board shall adopt a resolution, indicating the nature of the emergency and stating with particularity the emergency conditions necessitating the prompt execution of the contract. The exemption granted by such a resolution shall expire within 60 days unless the board grants an extension. (Ord. 283 § 4, 1984; Ord. 226 § 4, 1977).