Money received from the rendering of services under the prison camp work program shall be paid to the Treasurer monthly and shall be credited to the support appropriation of the prison rendering such services, in augmentation thereof. The appropriation to be credited shall be the appropriation current at the time of rendering the services. Nothing in this section shall apply to prison road camps established under Article 4 (commencing with Section 2760) of this chapter, except that, by mutual agreement between the Department of Transportation and the Department of Corrections, subject to the approval of the Department of Finance, such prison road camps may be administered, instead, under the provisions of this article.