Affairs pursuant to subsection (b), and any amount transferred to the Secretary of Defense as described in subsection (c), shall be merged with, and be available for the same purposes and the same time period as, the appropriation or fund to which transferred. (e) Shared medical facility defined In this section, the term shared medical facility means a building or buildings, or a campus, intended to be used by both the Department of Defense and the Department of Veterans Affairs for the provision of health-care services, whether under the jurisdiction of the Secretary of Defense or the Secretary of Veterans Affairs, and whether or not located on a military installation or on real property under the jurisdiction of the Secretary of Veterans Affairs. Such term includes any necessary building and auxiliary structure, garage, parking facility, mechanical equipment, abutting sidewalks, and accommodations for attending personnel. . (b) Clerical amendment The table of sections at the beginning of such chapter is amended by inserting after the item relating to section 1104 the following new item: 1104a. Shared medical facilities with Department of Veterans Affairs. . 710. TRICARE payment options for retirees (a) In general Section 1099 of title 10, United States Code, is amended— (1) by amending the section designation and heading to read as follows: 1099. Health care enrollment system and payment options