(b) Not later than December 31, 1991, the district shall proceed to commence construction of an extension of its facilities to Warm Springs, subject to each of the following conditions:

1. (1) The Dublin extension is fully funded and ready for implementation.
2. (2) Appropriate federal and environmental approvals are obtained in a timely manner.
3. (3) Adequate funding is available from the sources described in subdivision (c).

(c) In order to meet the objective of completing construction of the Dublin and Warm Springs extensions of the district’s facilities, as contemplated by the Alameda County Transportation Expenditure Plan, the board of directors of the district shall take the following actions:

1. (1) Set aside, for expenditure on those projects, not less than fifty-eight million dollars ($58,000,000) from the district’s reserve funds.
2. (2) Commit for expenditure on those projects, an additional amount of not less than one hundred twenty-six million dollars ($126,000,000) if, pursuant to an agreement between the district and the San Mateo County Transit District, the district is to receive two hundred million dollars ($200,000,000) as a capital contribution from the San Mateo County Transit District.
3. (3) Seek additional funding as may be available from an increase in San Francisco Bay area bridge tolls pursuant to Chapter 406 of the Statutes of 1988, together with funding from state and other sources, to provide not less than six hundred two million dollars ($602,000,000) to fund the Dublin and Warm Springs extensions as provided for in the Alameda County Transportation Expenditure Plan.