Two years later, in 1967, he became minister for Development Cooperation in the Cabinet-De Jong, a post he held till 1971. In 1971 he was lijsttrekker of the CHU, presenting himself as a conservative and a "law and order" politician. In that same year Udink became minister of Transport, Public Works and Water Management in the Cabinets-Biesheuvel I and II. His political career ended in 1973. From 1973 till 1978 he was member of the Board of Directors of the Overzeese Gas- en Elektriciteitsmaatschappij N.V. (as Dutch gas and electricity company) and from 1978 till 1980 he served as its president.
