Time limits for tax assessments: prescribed limitation periods, specified exclusions, and minimum extension protect procedural fairness. Limitation periods bar the Assessing Officer from making assessments, reassessments or recomputations after prescribed outer time limits measured from the end of the relevant financial year or triggering events, with a longer ceiling when a reference to the Transfer Prices Officer is involved. Specified exclusions-including Advance Pricing Agreement proceedings, reopening or rehearing time, stays by court orders, audit directions, specified notice-and-order intervals, Authority for Advance Rulings and Settlement Commission applications-are not counted when computing limitation; if exclusion leaves less than sixty days, the available period is extended to sixty days. The limitation regime excludes actions taken to give effect to certain orders or court findings.