; (B) has not been systematically studied but is supported by a strong logic model; and (C) is a departure from existing workforce strategies. (12) Tier-2 practice Subject to subsection (c), the term tier-2 practice means a practice that will expand knowledge about the efficacy of a workforce strategy and provide more information about the feasibility of implementing proven workforce strategies in different contexts and is, with respect to a State— (A) a practice that has been implemented by a State program and evaluated by a State or by a neutral third party and the evaluation results indicate some potential for positive impacts on participant or system-wide outcomes; or (B) a practice that has not been previously implemented by the State, but is supported by strong evidence of positive change and has been evaluated before using an outcome, quasi-experimental, or random assignment design, and evaluation findings indicate some statistically significant positive change. (13) Tier-3 practice Subject to subsection (c), the term tier-3 practice means with respect to a State, a practice that— (A) previously has been implemented by a program funded by a State