“sanction under section 151”

An Assessing Officer cannot reopen an assessment under Section 147 based on a mere change of opinion regarding the same material available during the original assessment. Reopening requires fresh, tangible material or information that leads to a reason to believe income has escaped assessment.

A valid reassessment under Section 147 requires concrete 'reasons to believe' that income has escaped assessment, not mere suspicion or a desire to conduct fishing and roving enquiries. If the first proviso to Section 147 applies, there must be a specific finding of the assessee's failure to disclose material facts, not just a mere charge of bogus expenses.

A mechanical approval by the prescribed authority under Section 151, made without independent application of mind, vitiates and renders the entire reassessment proceedings invalid. Such approvals, often indicated by brief, unreasoned endorsements, lead to the quashing of the reopening of assessment.

An assessment can be reopened if there is tangible material indicating escapement of income, demonstrating a live link between the material and the reasons recorded for reopening. The Assessing Officer must apply their mind to the material facts, and the sanction under section 151 should not be based on borrowed satisfaction.

A sanction for issuing a notice under section 148 is invalid if the sanctioning authority grants approval mechanically, merely recording 'Yes, I am satisfied' without proper application of mind to the reasons for reassessment. The authority must demonstrate proper consideration to fulfill the statutory obligation under section 151.

Reassessment proceedings under Section 147 are invalid if the sanction required under Section 151 is obtained mechanically, without independent application of mind by the sanctioning authority, or is based on borrowed satisfaction.

Sanction under Section 151 granted in a mechanical manner, without application of mind, vitiates reassessment proceedings under Sections 147 and 148. The court also laid down guidelines for the Revenue to follow when reopening assessments, emphasizing the need to provide reasons and approval documentation to the assessee.

The sanction of a specified authority under Section 151 is a mandatory procedural check before issuing a notice under Section 148. This procedural safeguard aims to prevent mechanical reopening of assessments and harassment of the assessee.