operating expenses, international and entitlement travel vouchers, and USDH benefit and allowance payments Purchase Order, Blanket Purchase Agreement, Grant, travel authorization or agency specific authorization of preparing and reviewing invoices, vouchers, travel advance requests, and advance liquidations in US RFMS/M (Regional Financial Management System / Momentum), COAST (Consolidated Overseas Accountability incumbent enters payment transactions into the RFMS / Momentum system, the main source of financial management