PA is explicitly allowed. The MASS algorithm accounts for it.
Edit:
5. Proficiency Advancement The Wg/CC, delegated no lower than the Sq/CC, is the approval authority for Proficiency Advancement (PA). As a minimum, PA may be utilized in cases where overall student performance meets minimum course training standards and Special Syllabus requirements (SSR) prior to completion of a unit/block of training, while demonstrating consistent performance.