Streets and Highways Code § 25177

If the whole or any part of the project proposed in the report is approved and a contribution by the state is recommended, the California Transportation Commission shall thereupon adopt a resolution setting forth the amount of the contribution, the time and manner of payment thereof, and the purposes for which the contribution shall be used, and the state shall be committed and obligated to make the specified contribution out of any funds which are then or thereafter available for joint highway purposes.