This document builds on documents B.11/11 on staffing and B.11/12 on the administrative budget for 2016-2018, considered by the Board at its eleventh meeting. The Secretariat needs to be equipped with the necessary tools and adequate resources to support the Board in the realization of the more ambitious level of funding decisions. To this end, the revised staffing requirements and the budgetary implications are presented in this document. It also provides a brief justification for the need to strengthen the Secretariat in order to carry out its mandate and serve the Green Climate Fund more effectively.