Upon written permission secured from the Fire Chief, fireworks may be used for public or private exhibitions of fireworks in connection with fairs, carnivals or other celebrations. Application for such permits shall be made to the Chief and shall be issued under such reasonable regulations to protect the safety of persons or property as the Chief may prescribe. In such cases parties in charge of such exhibitions shall be held strictly responsible for any damage to persons or property resulting from the use of fireworks so used. Fireworks being held in storage for such exhibitions must be kept in a closed wooden box or tarpaulin until they are to be used. Sections 549.08 and 549.09 do not prohibit any wholesaler, dealer or jobber from selling at wholesale such fireworks as are permitted to be used by such sections or the sale of fireworks to be shipped directly out of the State.