(a) GAO shall issue a decision on a protest within 100 days after it is filed.
(b) In protests where GAO uses the express option procedures in Sec. 21.10, GAO shall issue a decision on a protest within 65 days after it is filed.
(c) GAO, to the maximum extent practicable, shall resolve a timely supplemental protest adding one or more new grounds to an existing protest, or a timely amended protest, within the time limit established in paragraph (a) of this section for decision on the initial protest. If a supplemental or an amended protest cannot be resolved within that time limit, GAO may resolve the supplemental or amended protest using the express option procedures in Sec. 21.10.