The P3O® Foundation (2013) manual identifies securing investment as a key responsibility of the P3O Sponsor. Section 3.5.1 states, "The P3O Sponsor is responsible for securing the investment required to establish and sustain the P3O, advocating its value to senior management." This differs from ensuring portfolio delivery (A), staff recruitment (C), or programme mix (D), which are Portfolio Office or Analyst roles. The 2013 edition emphasizes the Sponsor’s leadership in funding advocacy, ensuring the P3O’s viability. This role drives strategic commitment and resource allocation.