A Federal agency which obtains administrative services from the Department of State pursuant to an agreement authorized under subsection (a) shall make full and prompt payment for such services through advance of funds or reimbursement.

The Secretary of State shall bill each Federal agency for amounts due for services provided pursuant to subsection (a). The Secretary shall notify a Federal agency which has not made full payment for services within 90 days after billing that services to the agency will be suspended or terminated if full payment is not made within 180 days after the date of notification. Except as provided under paragraph (3), the Secretary shall suspend or terminate services to a Federal agency which has not made full payment for services under this section 180 days after the date of notification. Any costs associated with a suspension or termination of services shall be the responsibility of, and shall be billed to, the Federal agency.

The Secretary of State may waive the requirement for suspension or termination under paragraph (2) with respect to such services as the Secretary determines are necessary to ensure the protection of life and the safety of United States Government property. A waiver may be issued for a period not to exceed one year and may be renewed.