Section 23(2) in The Right of Children to Free and Compulsory Education Act, 2009
(2)Where a State does not have adequate institutions offering courses or training in teacher education, or teachers possessing minimum qualifications as laid down under sub-section (1) are not available in sufficient numbers, the Central Government may, if it deems necessary, by notification, relax the minimum qualifications required for appointment as a teacher, for such period, not exceeding five years, as may be specified in that notification:Provided that a teacher who, at the commencement of this Act, does not possess minimum qualifications as laid down under sub-section (1), shall acquire such minimum qualifications within a period of five years.[Provided further that every teacher appointed or in position as on the 31st March, 2015, who does not possess minimum qualifications as laid down under sub-section (1), shall acquire such minimum qualifications within a period of four years from the date of commencement of the Right of Children to Free and Compulsory Education (Amendment) Act, 2017.]