 KESADHARI , a term defining a Sikh as one who carries on his head the full growth of his kes ( hair ) which he never trims or cuts for any reason . Anyone , Sikh or non @-@ Sikh , may keep the hair unshorn , but for the Sikh kes , unshorn hair , is a requisite of faith and an inviolable vow . The Sikh Rahit Maryada published by the Shiromani Gurdwara Prabandhak Committee , statutory body for the control and management of Sikh shrines and by extension for laying down rules about Sikh beliefs and practices , issued in 1945 , after long and minute deliberations among Sikh scholars and theologians , defines a Sikh thus : Every Sikh who has been admitted to the rites of amrit , i.e. who has been initiated as a Sikh , must allow his hair to grow to its full length . This also applies to those born of Sikh families but [ who ] have not yet received the rites of amrit of the tenth master , Guru Gobind Singh . " . 
