Section 21A(2) in Bihar Entertainments Tax Act, 1948
(2)Notwithstanding any judgement, decree or order of any Court, Tribunal or Authority. -(a)any amount levied, paid, collected or recovered or purported to have been levied, paid, collected or recovered as tax or penalty under the provisions of the aforesaid Ordinances and the Act and rules made and notifications issued thereunder, for the period beginning from the 17th January, 1976 shall be deemed to have been validly levied, paid, collected or recovered;(b)any proceeding commenced or conducted or purported to have been commenced or conducted for the assessment, collection or recovery of any amount as tax or penalty under the provision of the said Ordinances and the Act and Rules made and notifications issued thereunder for the period specified in clause (a) shall be deemed to have been commenced or conducted or purported to have been commenced or conducted in accordance with the provisions of this Act.