Notwithstanding any other provision of this division, the Tuolumne Regional Water District may, pursuant to the notice, protest, and hearing procedures in Section 53753 of the Government Code, fix, levy, and collect a sewage and waste service standby or availability charge of not more than thirty dollars ($30) per acre per year for each acre of land, or thirty dollars ($30) per year for each parcel of land less than an acre, to which sewer service is made available by the district, unless the standby or availability charge is imposed pursuant to the Uniform Standby Charge Procedures Act (Chapter 12.4 (commencing with Section 54984) of Part 1 of Division 2 of Title 5 of the Government Code). If the procedures set forth in this section as it read at the time a standby or availability charge was established were followed, the Tuolumne Regional Water District may, by a four-fifths vote of the members of the board of directors, continue the charge pursuant to this section in successive years at the same rate. If new, increased, or extended assessments are proposed, the district shall comply with the notice, protest, and hearing procedures in Section 53753 of the Government Code.