In a letter to Yadav, the Governor asked for the reasons why Rizvi who was appointed as a minister during cabinet expansion in June, has not taken oath, a release from the Raj Bhawan said.
Except Rizvi, four other ministers were administered oath of office and secrecy on June 27 at a function in Raj Bhawan.
Rizwi could not take oath at that time as he was out of the country.
Three of the four members of the board were sworn-in on July 14. Singh who was present in the function could not take oath due to unavoidable circumstances, the release added.
Naik also drew the Chief Minister's attention to the fact that the tenure of Board's chairman, Kapil Dev, has come to an end in July and asked him to take necessary action for making the new appointment at the earliest.