In the years 1955-1968 and 1969-1971 he was a member of the Central Committee of the Communist Party of Slovakia ( ÚV KSS ) ; in 1962-1968 he was the secretary and from January until August 1968 General secretary of ÚV KSS ; from April 1968 until December 1988 a member of the Presidium of the Central Committee of the Communist Party of Czechoslovakia ( ÚV KSČ ) .
First , from 1955 until 1971 , he was a member of the Central Committee of the Communist Party of Slovakia ( ÚV KSS ) .