805 ILCS 30/11

Any corporation purchasing or leasing the property of any company or companies, or into which any company or companies are consolidated and merged under this act, shall be, at the time of availing itself of or accepting the benefits of this act, in the actual business of furnishing gas to consumers; and shall be subject to the following provisions: Such corporation shall not increase the price charged by it for gas of the quality furnished to consumers during any part of the year immediately preceding such purchase or lease, or such consolidation and merger. Such corporation shall furnish gas to consumers as good in quality as it furnished previous to such purchase or lease, or such consolidation and merger.