; and (C) make such expanded training mandatory for— (i) individuals in senior and supervisory positions; and (ii) individuals having responsibilities related to recruitment, retention, or promotion of employees. (2) Best practices Each agency shall give special attention to ensuring the continuous incorporation of research-based best practices in training provided under this subsection. 106. Sense of Congress on support for equal employment opportunity and merit principles criteria It is the sense of Congress that— (1) the support for equal employment opportunity and merit principles criteria for tenure and promotion in the Foreign Service is critical to promoting a more diverse Foreign Service; and (2) the Department should— (A) develop mechanisms to ensure that the Foreign Service promotion list appropriately promotes a diverse workforce