; (B) to the extent necessary to implement the budget; or (C) as otherwise required by law. 103. Personnel ceiling adjustments (a) Authority for increases The Director of National Intelligence may authorize employment of civilian personnel in excess of the number authorized for fiscal year 2018 by the classified Schedule of Authorizations referred to in section 102(a) if the Director of National Intelligence determines that such action is necessary to the performance of important intelligence functions, except that the number of personnel employed in excess of the number authorized under such section may not, for any element of the intelligence community, exceed 3 percent of the number of civilian personnel authorized under such schedule for such element. (b) Treatment of certain personnel The Director of National Intelligence shall establish guidelines that govern, for each element of the intelligence community, the treatment under the personnel levels authorized under section 102(a), including any exemption from such personnel levels, of employment or assignment in— (1) a student program, trainee program, or similar program; (2) a reserve corps or as a reemployed annuitant