It is the intent of the Legislature in enacting Sections 3206, 3207, and 3209 to provide the revenues necessary for the financing by joint powers agencies of the described facilities and projects, which shall be deemed to be public capital improvements within the meaning of Article 4 (commencing with Section 6584) of Chapter 5 of Division 7 of Title 1 of the Government Code. Deposits into the account in the fund in accordance with paragraph (1) of subdivision (a) of Section 3205 shall continue through and include either the 20th year after the initial calendar year in which the revenues are collected, or whatever period of time is necessary to repay any borrowings of the joint powers funding mechanism.