The said Bench by its judgment and order dated September 3, 1970 allowed all the writ petitions filed by the respondents and quashed the impugned notices holding that Narendra Nath Mandal 's case (supra) had been wrongly decided; that rule 41 of the Mineral Concession Rules, 1949 made under section 5 of the 1948 Act which was claimed by the appellants to have been continued in force by virtue of section 29 of the 1957 Act and to justify the, demand for royalty for the period prior to June 1, 1958 was applicable only to contractual grants envisaged by the said Rules and could have no application to statutory leases arising by virtue of section 10 of the Bihar Land Reforms Act; that there was no warrant for pushing back section 9 of the 1957 Act by virtue of section 29 thereof to any date anterior to that on which the said Act came into force; that as section 30A of the 1957 Act on its true interpretation, imposed a temporary bar on the operation of the provisions of section 9(1) not only in respect of mining leases grant ed before October 25, 1949 in respect of coal but also in relation to those leases which expression covered the statu tory leases of the respondents which must be deemed to have come into existence with effect from the date of vesting under the Bihar Land Reforms Act, the demand for royalty for the period commencing from June 1, 1958 to December 31, 1965 was also unjustified and illegal.