The Secretary shall be responsible for the: Development and promulgation of the regulations in this chapter, including travel reimbursement rates, with the approval of the Board; Procurement of travel and credit service contracts and rate agreements; Development and administration of travel and credit service contracts and rate agreements; Program monitoring, evaluation, and guidance; Liaison with State units to ensure the effective and efficient operation of the travel management program and compliance with this chapter. This shall include resolving problems and complaints of the units and travel and credit service contractors and providing educational material to agency travel coordinators and employees.