Subject to such restrictions and conditions as may be prescribed, the Commissioner may, by order in writing, delegate any of his powers under this Act except those under sub-section (3) of section 9 and sub-section (1) of section 52 to any person appointed under sub-section (2) of section 9:
     Provided that the powers of the Commissioner under clauses (i) to (vi) (both inclusive) of sub-section (3) of section 41 shall not be delegated to any person lower in rank than that of a Sales Tax Officer, and those under sub-section (1) of section 49 shall not be delegated to any person other than an Additional Commissioner of Sales Tax appointed under sub-section (2) of section 9.