Disclosure of information respecting assessees— (1) The application to the [Chief Commissioner or Commissioner] under [clause (b) of] sub-section (1) of section 138 for information relating to an assessee in respect of any assessment made either under the Act or under the Indian Income-tax Act, 1922 (11 of 1922), on or after the 1st day of April, 1960, shall be made in Form No. 46.

(2) The information under [clause (b) of] sub-section (1) of section 138 shall be furnished by the [Chief Commissioner or Commissioner] in Form No. 47.

(3) Where it is not possible for the [Chief Commissioner or Commissioner] to furnish the information asked for by the applicant under [clause (b) of] sub- section (1) of section 138 owing to the fact that the relevant assessment has not been completed, he shall inform the applicant in Form No. 48.

(4) Where the [Chief Commissioner or Commissioner] is satisfied that it is not in the public interest to furnish or cause to be furnished the information asked for, he shall intimate the fact to the applicant in Form No. 49.