Earlier Show cause Notice could be issued on basis of the best judgement in terms of Rule 7 of Central Excise (Valuation) Rules, 1975 which is extracted below :Rule 7 :
"If the value of excisable goods cannot be determined under the foregoing rules, the proper officer shall determine the value of such goods according to the best of his judgment, and for this purpose he may have regard, among other things, to any one or more of the methods provided for in the foregoing rules."
These valuation rules were superseded by Central Excise (Determination of price of excisable goods) Rules, 2000 vide Notification No.45/2000-CE (NT) dated 30.6.2000 as amended. These new rules had no provision of 'Best Judgement Assessment'.
However, it is worthwhile to go through Chapter 3 Part IV Para No.3.1 of CBE & C's Central Excise Manual of Supplementary Instructions, 2005 which extracted below :
" -------------- Where the assessee fails to provide records or information and the department is unable to issue demand , best judgement method may be used to raise demand on collateral evidence. Burden to prove information for re-determination of duty is on assessee."