A merging municipality shall transfer its assets and liabilities to the unified municipality. The merging municipality shall transfer the assets and liabilities by legal instruments separate from the unified charter and resolution. The invalidity of a legal instrument that transfers or disposes of any property of a merging municipality does not affect the validity of the unified charter. Within 60 days after the unified charter is adopted, the legislative bodies of the merging municipalities jointly shall send the information concerning the charter to the Department of Legislative Services as provided in § 4–109 of this title. The exact text of the unified charter adopted under this subtitle, including any amendments, shall be included in any edition or codification of the charter.