Section 64

Essential officers and servants.
No essential officer or servant shall--
(a) unless he is authorised in that behalf by the terms of his contract, resign his appointment-or quit his employment without giving written notice, not less than one month previously, to the authority appointing him, of his intention so to do; or
(b) absent himself from duty otherwise than on leave duly granted and not subsequently cancelled; or
(c) neglect or refuse to perform any of the duties or wilfully perform them in an insufficient manner;