Consider the following statements:

I. Panchayats at the intermediate level exist in all States.
II. To be eligible to be a Member of a Panchayat at the intermediate level, a person should attain the age of thirty years.
III. The Chief Minister of a State constitutes a commission to review the financial position of Panchayats at the intermediate levels and to make recommendations regarding the distribution of net proceeds of taxes and duties, leviable by the State, between the State and Panchayats at the intermediate level.

Which of the statements given above are not correct?