The Legislature finds and declares that distribution and sales of motor vehicle fuels and oils in the State of California affect the general economy of the state, the public interest and the public welfare. Competition and freedom from unreasonable discriminatory practices are essential to the fair and efficient functioning of a free market economy. Competitive conditions are rapidly changing with resulting market dislocation. Therefore, it is further provided that any existing contracts, arrangements, or agreements with provision for prices not in compliance with this chapter shall be void on and after the effective date of this chapter as to such provisions, except for any as may be required to be extended beyond said date to comply with any applicable federal price control laws, regulations or orders.