It is an on-going process: to maintain the razor’s edge of Truth between hypocrisy and fanaticism, preserving the Essence of the Guru's Teachings. Rehit Namas are collections of Codes of Conduct for the Sikhs. There are many of these collections, some more detailed than others, and some quite obscure. Many of the admonitions and guidelines pre-date Guru Gobind Singh, but with the establishment of the Khalsa, He verified and formalized the Code of Conduct for Khalsa. In the years following Guru Gobind Singh, many of those Sikhs who had been blessed to hear his words, such as Bhai Nand Laal, Bhai Sukha Singh, Bhai Chaupa Singh, Bhai Daya Singh, and others, recorded them in the various versions of Rehit Namas. Later, the S.G.P.C. published the authoritative Sikh Rehit Maryada.