| (a) | - | on the assessment or reassessment of the firm, or |
| (b) | - | on any reduction or enhancement made in the income of the firm under this section, section 154, section 250, section 254, section 260, section 262, section 263 or section 264, or |
| (c) | - | on any order passed under sub-section (4) of section 245D on the application made by the firm, |