(a) After receiving a certification under Section 401.062, the comptroller shall determine whether money other than emergency appropriations is available for purposes of the emergency. The comptroller may obtain from any other agency whatever assistance the comptroller considers necessary for this purpose.
(b) The comptroller shall endorse on the governor’s certification the availability or unavailability of other money, stating the source and amounts of available money, if any.

(c) The comptroller must return the governor’s certification to the governor’s office not later than the second working day after the date the comptroller receives the certification.