The board of library trustees may dissolve the library commission created under the provisions of this article effective as of the 30th day of June next succeeding. Before taking action to dissolve a library commission, the board of library trustees shall hold at least one public hearing on the matter; notice of such hearing shall be given by publication pursuant to Section 6066 of the Government Code, in a newspaper designated by the board of library trustees and circulated throughout the district, and by posting of the notice in three public places in the district at least 15 days prior to the date of the public hearing.