(a) Except as provided in subsection (b) of this section, a public-private partnership agreement may not exceed 50 years, including all renewals and extensions.
(b) The Board of Public Works may:
(1) waive the prohibition set forth in subsection (a) of this section if the Board determines that the reporting agency has demonstrated sufficient reason for the agreement to have a longer term; and
(2) waive the prohibition set forth in subsection (a) of this section at any point during the presolicitation, proposal review, or agreement negotiations process.