He then successfully contested in the 1967 Goa, Daman and Diu Legislative Assembly election from the same constituency on the UGS ticket, he defeated MGP candidate, Melo Agosttinho Santana by a margin of 2,190 votes.

[6] Pereira then contested in the 1972 Goa, Daman and Diu Legislative Assembly election from the same constituency on the UGS ticket, he emerged victorious by defeating MGP candidate, Melo Agosttinho Santana by a margin of 1,366 votes.

[7] He then unsuccessfully contested in the 1977 Goa, Daman and Diu Legislative Assembly election from the same consistency on the Janata Party ticket, he lost to Indian National Congress (INC) candidate, Shripad Cuncolienkar by a margin of 405 votes.

Pereira last unsuccessfully contested in the 2002 Goa Legislative Assembly election from the same constituency on the United Goans Democratic Party ticket, he lost to INC candidate, Francisco Silveira by a margin of 6775 votes.

Goa chief minister, Pramod Sawant said that he was saddened by the demise of Pereira and also gave his condolences to the family on Twitter.

Fatorda MLA, Vijai Sardesai also tweeted, "An Era Ends; The demise of Teotonio Pereira, a member of Goa’s first legislative assembly brings profound sadness.

[10] He also added that despite being from two different opposing political parties it never affected their friendship, Khalap also recalls that Pereira invited him to organise his wedding reception on the rooftop of his newly built house in 1977.