Section 272(1)(a) in Chhattisgarh Building and Other Construction Workers' (Regulation of Employment and Conditions of Service) Rules, 2008
(a)Proof of age in one or more of the following forms namely : -(i)Certificate or Mark Sheet awarded by an Examining Board or University or School Leaving Certificate issued by the last school attended;(ii)Certificate from the Registrar of Births and Deaths ;(iii)In the absence of the above certificates, a certificate from a Medical Officer not below the rank of an Assistant Surgeon in Government Services.