The legislative body shall not change any boundaries or acquisitions and improvements, except after notice of intention to do so is published pursuant to Section 6066 of the Government Code in the newspaper in which the resolution of intention was published. The notice shall specify a time for hearing objections to the proposed change, which shall be not less than twenty (20) days after the first publication of the notice. If a change proposed is to include additional real property in the district, the clerk of the legislative body shall also mail a copy of the notice, postage prepaid, to each person to whom real property in the area proposed to be added is assessed as shown on the last equalized assessment roll, at his address as shown upon the roll, and to each person, whether owner in fee or having a lien upon, or legal or equitable interest in, any such real property, whose name and address and a designation of the real property in which he is interested is on file in the office of the clerk. The notice shall be mailed at least 20 days prior to the time set for hearing objections.