 Later on in 1973, the remaining three Rural District Councils were also merged into a single local authority that encompasses all of Seberang Perai, the Seberang Perai Local Government Management Board.Following the enactment of the Local Government Act 1976, the local board was succeeded by the Seberang Perai Municipal Council.At that point, the municipal council's jurisdiction covered an area of over , encompassing all of Seberang Perai and a few offshore islets, making it the largest municipal council in Malaysia in terms of land size.