The minimum tenure for a member of the State Public Service Commission (SPSC) is 6 years.

Explanation:
The State Public Service Commission is a constitutional body that is responsible for conducting examinations and making appointments to the state civil services. The tenure of a member of the SPSC is determined by the Constitution of India, specifically Article 316.

- Tenure of a member:
According to Article 316, the Chairman and members of the SPSC hold office for a term of six years or until they attain the age of 62, whichever is earlier. This means that the minimum tenure for a member of the SPSC is 6 years.

- Appointment and removal process:
The members of the SPSC are appointed by the Governor of the state. The Governor appoints the Chairman and other members in consultation with the State Public Service Commission and the Union Public Service Commission. The members can be removed from office only in the same manner and on the same grounds as a judge of a High Court.

- Independence and impartiality:
The minimum tenure of 6 years ensures the independence and impartiality of the members of the SPSC. It provides them with a fixed term during which they can perform their duties without fear of arbitrary removal. This helps in maintaining the integrity and credibility of the SPSC.

In conclusion, the minimum tenure for a member of the State Public Service Commission is 6 years. This tenure ensures the independence and impartiality of the members and allows them to perform their duties effectively.