8A. Determination of point of taxation in other cases.-
Where the point of taxation cannot be determined as per these rules as the date of invoice or the date of payment or both are not available, the Central Excise officer, may, require the concerned person to produce such accounts, documents or other evidence as he may deem necessary and after taking into account such material and the effective rate of tax prevalent at different points of time, shall, by an order in writing, after giving an opportunity of being heard, determine the point of taxation to the best of his judgment.