; and (2) require the periodic recertification of such status. ; (4) in subsection (d), as so redesignated, by striking and that the award can be made at a fair market price and inserting , that the award can be made at a fair market price, and if each concern is certified by the Administrator as a small business concern owned and controlled by service-disabled veterans ; and (5) by adding at the end the following: (g) Certification requirement Notwithstanding subsection (c), a contracting officer may only award a sole source contract to a small business concern owned and controlled by service-disabled veterans or a contract on the basis of competition restricted to small business concerns owned and controlled by service-disabled veterans if such a concern is certified by the Administrator as a small business concern owned and controlled by service-disabled veterans. (h) Enforcement; penalties (1) Verification of eligibility In carrying out this section, the Administrator shall establish procedures relating to— (A) the filing, investigation, and disposition by the Administration of any challenge to the eligibility of a small business concern to receive assistance under this section (including a challenge, filed by an interested party, relating to the veracity of a certification made or information provided to the Administration by a small business concern under subsection (b))