On 9 May 1969 Das, leading a dissident faction of the
Praja Socialist Party, was sworn in as Animal Husbandry & Veterinary Minister in the second
United Front government of
West Bengal. Das retained the Contai South seat in the
1971 West Bengal Legislative Assembly election, again standing on a PSP ticket but now facing opposition not just from the Indian National Congress but also the
CPI(M) (former United Front partner) and the
Congress(O). Das was named Minister for Animal Husbandry and Veterinary Services (including Zoological Gardens) in the cabinet formed by
Ajoy Mukherjee (a coalition of
Bangla Congress-INC-
Indian Union Muslim League-Rebel
Samyukta Socialist Party and Das' rebel PSP – Democratic Socialist Consolidation). ==Later years==