All ordinances of the board imposing any penalty or making any appropriations shall be published at least once a week for 2 weeks in at least one general circulation newspaper published in the museum district. If no newspaper of general circulation is published in the museum district, copies of such ordinances shall be posted in at least 15 conspicuous public places in the museum district. No such ordinance shall take effect until 10 days after it is so published or posted. All other ordinances and resolutions shall take effect from and after their passage unless otherwise provided therein.
     All ordinances, orders and resolutions and the date of their publication may be proven in court by the certificate of the secretary under the seal of the museum district and, when printed in book or pamphlet form and purporting to be published by the museum district, such book or pamphlet shall be received as evidence of the passage and legal publication of such ordinances, orders and resolutions as of the dates mentioned in such book or pamphlet.