Section 3 of the Validation Act provided that notwithstanding anything contained in any judgment, decree or order of a court or tribunal or any other authority, no tax assessed or purported to have been assessed by a municipality on the, basis of capital value of a building or land and imposed, collected or recovered by the municipality at any time before the commencement of the Validation Act shall be deemed to have invalidly assessed, imposed, collected or recovered and the imposition, collection or recovery of the tax so assessed shall be valid and shall be deemed to have always been valid and shall not be called in question merely on the ground that the assessment the tax on the basis of capital value of the building or land was not authorised by law and accordingly any tax so assessed before the commencement of the Validation Act and leviable for a period prior to such commencement but not collected or recovered before such commencement may be collected or recovered in accordance with the relevant municipal law.