It is the purpose and effect of this Part to contain all of the water quality requirements of the commission, whether in force because expressly set forth in the Tri-State Compact or in force because adopted by the commission pursuant to the provision of the compact variously known as article XVII or article VII.3. Accordingly, requirements contained in the compact and still in force are repeated in this Part and made part hereof. In accordance with article XVII or article VII.3 of the compact, the other provisions of this Part are in addition to or in substitution for requirements previously in force.