7. Thus, from perusal of the aforesaid provisions, it is evident that Caste and Income Verification Committee shall refer the application for issue of validity certificate to the District Social Officer concerned and report after holding local enquiries. Thereafter, on getting a report on a reference made under Rule 6A, Caste Verification Committee shall hold an enquiry after giving an opportunity of hearing to the parties. From perusal of Rule 7(4), it is evident that if the Committee after holding an enquiry finds that the claim is doubtful and the Committee is not in a position to come to a conclusion, it shall refer the matter to the Directorate of Civil Rights Enforcement for detailed investigation and report. It is well settled in law that when the statute provides a manner of doing a particular thing in a particular manner, that thing has to be performed in that manner alone. In this connection, reference may be made to decisions of Supreme Court in ‘RAMCHANDRA KESHAV ADKE AND OTHERS vs. GOVIND JOTI CHAVARE AND OTHERS’, AIR 1975 SC 915 and ‘COMMISSIONER OF INCOME TAX, MUMBAI vs. ANJUM M.H. GHASWALA AND OTHERS’, (2002) 1 SCC 633.