An undertaker who has given a notice relating to the execution of emergency works under section 6(5) of the 1950 Act on or before 31st December 1992 shall be deemed to have given a notice of emergency works under section 116 of the 1991 Act and the works executed in reliance on such a notice shall be deemed to be emergency works for the purposes of section 116 notwithstanding any of the provisions of section 111 of the 1991 Act.