The Director shall measure and evaluate the impact of all programs authorized by this chapter, their effectiveness in achieving stated goals, in general, and in relation to their cost, their impact on related programs, and their structure and mechanism for delivery of services. Each program shall be evaluated at least once every three years. Evaluations shall be conducted by persons not immediately involved in the administration of the program or project evaluated. Such evaluation shall also measure and evaluate compliance with the equitable distribution requirement of section 5054 of this title.