LIC AAO 28 Aug 2021 Shift 1 Paper

Which of the phrases given below the sentence should replace the word/phrase given below in bold in the sentence to make it grammatically correct? If the sentence is correct as it is given and no correction is required, mark 'No correction required as the answer.
The transport corporation have been issuing monthly and daily passes with revised fares since August 2019 that have not further been revised.